S3 custom. MIUI V5 review - the best firmware for Galaxy S3. Samsung GT-I9300 Galaxy S3 - factory firmware

Among the dozens of smartphone models produced annually by one of the market leaders - Samsung - the manufacturer's flagship devices attract special attention. As for the software part of Samsung flagships, here we can talk about the widest possibilities for its changeability. Let's consider the Samsung GT-I9300 Galaxy S III model in this aspect - the methods for flashing the device will be discussed in the material offered below.

A high level of performance and a large performance reserve, thanks to the use of the most advanced achievements in the industry, make it possible to easily use Samsung's flagship solutions for many years, without a critical drop in performance. Only the software part of the device requires some attention. However, for interacting with system software, up to its complete replacement, there are convenient tools and proven methods.

All manipulations according to the instructions below are carried out by the user at his own peril and risk. The author of the article and the Site Administration do not guarantee the achievement of positive results desired by the owner of the device, and are not responsible for possible damage to the smartphone as a result of incorrect actions!

To carry out the process of reinstalling system software in the Samsung GT-I9300 Galaxy S3 as quickly and efficiently as possible, it is necessary to carry out several preparatory procedures. This issue should be given due attention, because only after proper preparation can you count on a positive result of the firmware and quick elimination of errors that may appear when installing Android into the device.

Drivers

Almost all procedures that involve serious intervention in the system software of an Android smartphone require the use of a PC and specialized utilities as tools that allow manipulation. Therefore, the first thing you should take care of when you need to flash the Samsung GT-I9300 is the correct pairing of the device and computer, that is, installing drivers.

USB Debugging Mode

In order for Windows applications to interact with the software components of the smartphone, a special mode must be activated on the device - "USB Debugging". This option will need to be enabled for almost any manipulation that involves accessing data in the phone’s memory. To enable the mode, do the following:

Root rights and BusyBox

Without obtaining Superuser rights, serious interference with the software of the Samsung GT-I9300 Galaxy S III is impossible. At the preparatory stage, root rights will make it possible to create a full-fledged backup, and in the future they will allow you to carry out almost any manipulation with the system software, up to its complete replacement.

To gain privileges on the model in question, one of the software tools is used: KingRoot or KingoRoot - these are the fastest and simplest tools that make it easy to root the device. The choice of a specific application is up to the user; in general, they work equally efficiently and are easy to use.

In addition to root rights, many operations with the Galaxy S3 GT-I9300 model require the device to have installed
BusyBox is a set of console utilities that allow you to perform manipulations that require connecting additional OS kernel modules. The installer that allows you to get BusyBox is available on Google Play Market.

Backup

Theoretically, after installing drivers to perform manipulations with the Samsung GT-I9300 Galaxy S III through programs for interacting with memory partitions, there are practically no obstacles left, you can begin installing Android, but, as you know, this process may not always be error-free and can lead to damage to individual software components of the device, not to mention the fact that all user data will be deleted as a result of the procedure and everything necessary will need to be restored - contacts, photos, applications, etc. In a word, it is highly not recommended to start reinstalling Android without a preliminary backup.

User data

To save information accumulated in the phone’s memory during operation, the easiest way is to use Samsung’s proprietary Smart Switch tool, which was mentioned above when describing the driver installation process. We follow just three simple steps and all information will be archived in a backup copy:

It should be noted that restoration from a backup created using Samsung proprietary software will only be possible on a smartphone running official firmware. If you plan to switch to a custom one or want to additionally insure yourself against data loss, you can use one of the instructions for creating backup copies offered in the material at the link below:

EFS partition

An extremely important system memory area of ​​smartphones is "EFS". This section contains the device serial number, IMEI, GPS identifier, MAC addresses of Wi-Fi and Bluetooth modules. Damage or removal "EFS" in the process of manipulating system partitions, for various reasons it will lead to inoperability of network interfaces, and in some cases to the inability to turn on the phone.

For the model in question, creating a backup "EFS" before reinstalling the system software is not just a recommendation, but a mandatory requirement! Ignoring the operation to create a dump greatly increases the risk of getting an inoperable smartphone!

In order to always be able to quickly restore the partition "EFS" in Samsung Galaxy S3, let's create an area dump using a specialized software tool - EFS Professional.

Recovery "EFS" tab is used "Restore" in EFS Professional. After connecting the smartphone in the same order as when creating a backup, and going to the recovery section of the program in the list "Select a backup archive to restore" you need to select a backup file, check for checkboxes in the field "Archive Backup Contents" and by pressing the button "Restore", wait for the procedure to complete.

Firmware

One of the notable features of Samsung flagship devices is the availability of simply a huge number of modified unofficial firmware for them. The use of such solutions makes it possible to completely transform the software shell and obtain new versions of Android. But before moving on to installing custom ones, you should study the methods for installing official versions of the system. In case of problems, this skill will allow you to restore the model software to its original state.

Method 1: Smart Switch

The manufacturer Samsung has a fairly strict policy regarding interference with the software of its own brand devices. The only thing it allows you to do officially regarding the Galaxy S3 firmware is updating the system version through the proprietary Smart Switch software, which we already used above when installing drivers and creating a backup copy of information from the smartphone.

1. Install and launch Smart Switch. We connect the smartphone running Android to the USB port of the computer.



2. After the model is determined in the application, the version of the system installed on the phone is automatically checked against the version available on Samsung servers, and if an update is possible, a corresponding notification is displayed. Click "Update".



3. We confirm the need to start updating the phone system version - button "Continue" in the request window that appears with the revision numbers of the installed and available system software.



4. After reviewing the conditions under which the update is successful, click "Everything is confirmed".



5. Next, Smart Switch will carry out the necessary manipulations automatically, reporting what is happening in special windows with progress indicators:
   

   

6. After receiving confirmation that the OS update has been successfully completed in the Smart Switch window

   

   Samsung GT-I9300 Galaxy S3 can be disconnected from the USB port - all system software components are already optimized.

Method 2: ODIN

Using the universal ODIN tool to replace system software and restore Android in Samsung devices is the most effective method of manipulation. The application allows you to install official firmware of two types - service and single-file, and installing the first version of the package is one of the few ways to “revive” a Galaxy S III that is not functional in terms of software.

Before using ONE to overwrite memory partitions of the Samsung GT-I9300, we recommend that you read the instructions for reinstalling the system software using the application in the general case from the material available at the link:

Service package

A special type of package with system software used in service centers and intended for installation in Samsung Android devices via ONE is called "multi-file firmware" due to the fact that it includes several system component files. You can download the archive containing the service solution for the model in question using the link:

1. We transfer S3 to Odin mode. For this:
2. We launch ONE and connect the phone to the USB port. We make sure that the device is identified in the program in the form of a blue field filled with the number of the COM port through which the connection is made.



3. We add to the program the components of multi-file firmware from the folder obtained as a result of unpacking the archive downloaded from the link above.

   

   To do this, press the buttons one by one and specify the files in the Explorer window in accordance with the table:

   

   After loading all software components into the program, window ONE should look like this:

   

4. If you plan to re-partition the device’s memory, specify the path to the PIT file on the tab "Pit".

   

   It is advisable to carry out re-partitioning only in critical situations and when errors occur during the work of ONE without a PIT file! Initially, you should try to reinstall Android by skipping this step!

   Press the button "PIT" on the tab of the same name in ODIN and add the file "mx.pit", present in the catalog with the proposed package.

   

   When using a PIT file during the process of reinstalling Android on a Samsung GT-I9300 in the tab "Options" ODIN must be checked "Re-Partition".



5. After making sure that all files have been added to the appropriate fields and the parameters are set correctly, click the button "Start" to start transferring files to the device's memory.



6. We are waiting for ONE to overwrite areas of the smartphone’s memory. Interrupting the process is unacceptable; all that remains is to watch the progress indicators in the flasher window and, at the same time,

   

   on the S3 screen.



7. After the display of ongoing processes in ODIN displays "PASS",
   
   

   The device will reboot and the OS components will be initialized.



8. The Android installation is complete, and in the end we get a device cleaned of the remnants of the previous operating system,

   

   which demonstrates the same level of performance as when first turned on after purchase.

   

Single-file firmware

If you need to simply reinstall Android, update or roll back the version of the official Samsung GT-I9300 OS, a single-file package is usually used. You can download the latest version of the official OS for Russia to install it via ONE using the link:

Installing such a solution is much easier than a service solution. It is enough to follow the same steps as in the instructions for working with a multi-file package, but instead of points 3 and 4, you need to do it using the button "AP" adding a single file *.tar, contained in the directory obtained as a result of unpacking the archive with single-file firmware.

Method 3: Mobile ODIN

Many users of Android devices are interested in the possibility of reinstalling the OS on the device without using a PC. For Samsung GT-I9300, this action can be carried out using the Mobile ODIN tool - an Android application that allows you to seamlessly install official single-file firmware.

You can get the tool on your device by downloading it from the Google Play Market.

Successful execution of Mobile One functions is only possible if the device is rooted!

The software package used in the example below can be downloaded from the link:

1. Install Mobile One and place the package that will be installed in the internal memory of the Galaxy S3 or on a memory card installed in the device.



2. We launch the application and provide Mobile ODIN with root rights.



3. We download additional MobileOne components, which provide the ability to install packages with system software. You will be prompted to update the first time you run the tool. Confirm the need to download add-ons by tapping the button "Download" and wait for the installation of the modules to complete.



4. Before installation, the firmware file must be uploaded to Mobile ODIN. Scrolling through the list of options on the main screen of the application, find and click "Open file...". Select the storage where the firmware was copied, then specify the file intended for installation.



5. If you are rolling back the system version, you must first clear the device’s memory partitions. To do this, check the checkboxes "Wipe data and cache", and "Wipe Dalvik cache".

   

   In the case of an update, data cleaning may not be necessary, but performing the procedure is recommended, as it allows you to remove “software junk” from the system, and also prevents the appearance of many errors during the installation of Android and its further operation!

6. Click "Flash" and confirm the application requests that appear.



7. Mobile Odin carries out further manipulations without user intervention. The latter can only observe:



8. After the welcome screen appears, we perform the initial configuration of the OS parameters.



9. Everything is ready to use the Samsung GT-I9300 Galaxy S III running the reinstalled official Android.

Method 4: Custom firmware

The above-described methods for installing official versions of Android in the Samsung S3 allow you to restore the device to its factory state and solve a lot of problems that arise for various reasons while using the smartphone. If the purpose of firmware for a device is to completely transform the software part, introduce new functions into the device and turn the phone into a truly modern device, at least in terms of the OS version, you should pay attention to the possibility of installing one of the custom firmwares.

Since the level of popularity of the model in question is extremely high, a large number of different unofficial system software solutions have been created for it, based on Android versions of KitKat, Lollipop, Marshmallow and Nougat. The most popular modified shells for S3 are discussed below, and their installation can be divided into two stages - equipping the smartphone with a modified recovery, and then directly installing the unofficial Android.

Installation, launch, configuration of TWRP

In order for it to be possible to install a modified unofficial OS on the model in question, the device must be equipped with a special recovery environment - custom recovery. Several solutions are available for the device in question, including ClockworkMod Recovery (CWM) and its updated version Philz Touch, but the most functional and convenient product today is considered TeamWin Recovery (TWRP), and it should be installed to get results, as in the examples below.

For all Samsung flagship solutions, the TeamWin team has officially developed and released recovery packages, which are installed using several methods. Two of them have already been described in articles on our website.

In an effort to get the latest versions of Android on the Samsung GT-I9300, many device owners ignore the possibility of using one of the most beautiful and functional shells for the device in question - MIUI. Meanwhile, this particular product is considered one of the best solutions, despite the fact that it is based on Android 4.4, which is losing its relevance.

MIUI packages intended for installation in the model in question are also available on the websites of well-known development teams miui.su and xiaomi.eu.

Firmware images:

Instructions for installing the firmware:

Firmware rules:

- Follow the instructions carefully and clearly, all steps must be performed strictly as indicated and with the attached files or links
- If you have questions, please use the " " section by asking a question through " ")

continuation of the rules...

You can install the firmware only on the model indicated in the description, the model must match down to every number and letter
- Everything you do with your smartphone is done at your own peril and risk! Accordingly, the author is not responsible for a negative result!
- Charge your smartphone at least 50%
- During the firmware installation, your smartphone should lie still, it’s better not to even breathe!
- If in doubt, read it again!
- If it doesn’t work out for you, repeat the firmware again, reading the instructions again!
- The installation of the firmware was tested on the files listed below for download, you can use other files at your own peril and risk!

Required files:

1. Create a folder in the root hard drive with English letters or numbers (for example: C:\i9300)

2. Download everything needed for the firmware into the created folder using the links below (it is recommended to download the latest versions)

Firmware I9300XXUGMK6 (single-file, for Russia)

Preparing for firmware:

3. Disable unnecessary things on your computer:

If you have Kies installed, then you have 2 options:
- Remove Kies
- Go to the application manager (ctrl+alt+del) and end all processes where it says Kies

If you have an antivirus, disable it

4. Install the programs necessary for the firmware:

Install drivers Samsung USB Driver for Mobile Phones

Unzip Odin PC (Extract Here)

Unpack the Firmware (Extract Here)

5. Put Galaxy S3 into Download Mode:

Turn off the phone completely, everything should go dark.

Press three keys at the same time " Power + Volume Down + Home"

A warning will appear, you need to click " Volume up"

6. Installing firmware via Odin:

Run Odin3 (.exe), it should be located in the folder of the same name

Click on the field PDA and find the firmware file in .md5 or .tar format, which was saved to the i9300 folder

Connect the phone with the original cable to the computer, first field ID:COM lights up blue

If all the previous steps are done, click "Start"

After successful completion you will see the message "PASS!"

Disconnect your phone from your computer

7. Booting the phone after flashing the firmware
- If everything is done correctly, you will see a loading animation and then the device itself will boot from new firmware. Loading takes longer than usual!

8. Other firmware and goodies can be found on the blog, subscribe and participate.

For the current generation of people, the smartphone has become an indispensable assistant and an extremely useful device that combines hundreds of different functions. Taking a photo, counting the number of ingredients, setting reminders, checking the weather, reading the news, chatting with friends - this is not a complete list of everything that modern smartphones are capable of. Sometimes we simply forget that they do not last forever and are subject to gradual wear and tear.

The firmware process is quite interesting. QS has an installer where you can select installation and application options. The first time I did not install the firmware with the desired parameters (also, the phone froze when loading, on the Samsung logo). I had to choose more modest - stock parameters. After that everything worked.

QS-3.3 with stock parameters is very similar to official firmware Galaxa S3, except that a few options have been added (for example, a screen mode in grayscale, like on the Galaxy S5). So far there are no complaints about its performance. Of course, in this regard, the CyanogenMod interface is much nicer, but you can live with this familiar interface.

How to flash Galaxy S3?

Very often, owners of a Korean Samsung smartphone strive to increase the device’s performance and functionality by flashing it. Update software helps improve specifications gadget. In this article we will look at how to flash a mobile phone using the Samsung Galaxy S3 as an example.

How to flash a smartphone yourself

Before starting work, charge your phone (preferably to the maximum) and use it to backup copy important information. To follow the instructions, you will need a computer or laptop with a connection to global network, as well as a USB cable.

1. The first step is to download the flashing program to your computer (this article assumes the use special program Odin), latest version firmware for the phone model of interest and a set of drivers for the smartphone (for example). For convenience, place all downloaded files in one folder.
2. To avoid unexpected situations during a software update, we recommend disabling Anti-Virus for the duration of the procedure.
3. It is also worth disabling the Kies program (if it is installed).
4. After downloading, install everything necessary programs on computer. Unzip the firmware file.
5. Next, you need to manipulate the smartphone, namely, switch the phone to download mode. To do this, turn off the device and simultaneously press the following buttons - Menu (Home), Power and Volume with the slider up. Wait for the information message to appear on the screen mobile phone and press the volume key (up slider) again.
6. After these steps, connect mobile device to a computer using a USB cable.
7. Run Odin program, then click on the PDA button and select the firmware file.
8. Next, click the "Start" button and wait for the software installation to complete. Typically the firmware process lasts about five minutes. During this time, it is important not to disconnect the phone from the computer.
9. Once the operation is completed, a “Pass” or “Reset” message will appear on the smartphone screen, and then the phone will reboot.
10. Disconnect your mobile phone from the computer, close the program and use the flashed smartphone.

It is worth noting that contacting to update the software will entail considerable costs.

Flashing a mobile phone yourself should not be difficult if you strictly follow these instructions. However, we warn you that if you are not confident in your abilities, then it is better to entrust the operation to professionals. Please note that the editors are not responsible for incorrect actions taken by the user.

You can find it in our section.

If your smartphone is several years old and you are already tired of it, is it possible to breathe new life into it? Make him please you again for some more time? Most users will most likely say that no, the smartphone is outdated, there is not enough RAM, the processor is no longer “cake”, there is not enough built-in memory, and the screen resolution has begun to hurt the eyes. I won’t even say anything about the lost battery capacity. But if you have a popular flagship from previous years, then you can still do something.

Battery replacement

In most cases, the battery starts to fail first. A year, a maximum of a year and a half, and we notice that our smartphone hardly “survives” not only until the evening, but even better until lunch. If the battery is removable, then the problem is minimized.For some smartphone models it is not difficult to find an original battery. True, the price will not be entirely humane. A good alternative would be Craftmann batteries. Finding such a battery will not be a problem.

Again, there are many alternative options, let's look at one of them. This is a monstrous battery, with a stated capacity of 6400 mAh. Comes with a back cover for the smartphone, replacing the original one. When installing all this, the smartphone is completely disfigured, but you get a guaranteed two days of work.

You can, of course, carry a portable battery with you everywhere, or constantly keep your smartphone on charge at your workplace, but you must admit, each of us wants more autonomy from our smartphone, therefore, replacing the battery cannot be avoided, in any case.

Bored or lagging firmware

Now we come to the most interesting part. Most users of Samsung's early flagships sooner or later encountered the problem of “brakes” on their smartphone. The desktops were scrolled through with noticeable slowdowns, the dialer opened for several seconds, the camera took a long time to start up... All this began to irritate, and some users decided to reflash their smartphone to custom firmware. In our case, there are very, very many different options. Perhaps the most stable and supported firmware is Cyanogen Mod. Samsung stopped updating its 2012 flagship SGS3 for a very long time. The latest official version of Android there seems to be 4.2.2. or 4.3.1. But the Cyanogen Mod firmware is already available on Android 6.0.1. Of course, there will most likely not be an Android 7 for this smartphone, but thanks to the developers for that too. But as of this year, to the great regret of fans of this firmware, the Cyanogen Mod project has been closed... Perhaps enthusiasts will release their modifications for some time, but officially, we will no longer receive Cyanogen Mod. But there is good news, instead of Cyanogen Mod, we got LineageOS, and thanks to it, our SGS3 still received Android 7.1.1!!!

A brief overview of LineageOS for the 3rd Galaxy.

Firstly, I want to say that interaction with the smartphone interface does not leave a depressing impression, as with stock firmware. But still, you shouldn’t expect much either, the hardware is old. The smartphone works quite quickly, but turns on with some delay. The dialer opens faster than on stock, desktops turn over smoothly. Applications open in different ways, some quickly, and some take 2-3 seconds to complete. But we have Android 7.1.1! True, the assembly is “nightly”, that is, some functions of the smartphone and programs may not work correctly. There were already stable builds on the Cyanogen Mod firmware, and in general, the operation of the smartphone was satisfactory. But enough about Cyanogen Mod, let's explore the features of the LineageOS firmware. In the smartphone settings, in the “About phone” section, we can see information about the phone’s status, device model, Android version and firmware:
This is what the main screen looks like:
A few words about applications from Google, after installing LineageOS, they simply do not exist, and we will have to install them ourselves. It's as simple as installing the firmware itself. When you have flashed LineageOS, without leaving recovery, install GApps (a package of programs and services from Google). You can download them. And after installing all this, we will see the following picture: all Google applications will appear on your smartphone!

Unlike, for example, MIUI, our firmware has an application menu:
The notification shade, as on all smartphones, is called up by swiping from the top of the screen down; if you make a short swipe, notifications will open; if you swipe long, then icons for various switches will open:

In general, the LineageOS firmware is close to “naked” Android, only there will be more settings. For example, you can change the color of the indicator for different events. In stock, there are only three colors, but on LineageOS you can mix these colors the way you want.

What else can you tell about this firmware? The camera interface is very primitive. The list of recently launched programs looks like on bare Android.

Here are some more screenshots of the battery menu:

This is what the settings menu looks like:

In general, everything is simple and functional, it doesn’t even have its own themes like the Cyanogen Mod, but over time, I hope the developers will fix this. It remains to solve the main question, how to install all this? Yes, so that the smartphone does not turn into a “brick”?

Install LineageOS firmware on SGS3

Now we come to the most important thing. If you already have custom recovery installed, for example TWRP, then everything is very simple. Let's do everything in order and without fuss:

1.Download and copy the firmware to the smartphone, to the memory card (Micro SD Card) in the root directory. Download the appropriate versions of Android Gapps and copy the Gapps to your smartphone, to a memory card (Micro SD Card) in the root directory.

2. Turn off the smartphone

3. Simultaneously press the “volume+”, “home” and “power” buttons, when the Samsung Galaxy S3 logo appears, release the buttons, and after a few seconds we get to the main recovery menu.

4.Select “cleaning”, then “selective cleaning”

5. Check the items Dalvik/ART Cache, Cache, Sistem, Data. Item “Int. The memory “can also be cleared, but not necessarily. IMPORTANTLY DO NOT CHECK THE “Micro SD Card” CHECK!

6. With a casual swipe to the right, we give the command to clean.

7.After successful cleaning, we return to the main menu and select the “Install” item, then the item (parent directory) and finally we reached the “external_sd” item. Click it and select the file with the firmware.

8. Swipe to the right again and wait for the firmware to finish. Upon completion of this operation, you will be prompted to clear Dalvik and Cache. This can be done, but it can also be ignored.

9.Select the “Install” item again, then the (parent directory) item and the “external_sd” item. Click it and select the file with Gapps.

10. Swipe to the right to confirm the installation.

11. After installing Gapps, you can agree to clear Dalvik and Cache one more time and then, in the main menu, select “Reboot” and click on the “System” button.

The download process will take quite a long time. When everything is installed, you will be asked to select a language, set the time and log in to your Google account. After that, you can familiarize yourself with and evaluate LineageOS.

Firmware for Samsung galaxy sIII smartphone via odin.

Instructions for flashing a Samsung Galaxy S3 smartphone using single-file firmware via the Odin 3 program on Windows

Any digital device, be it a player, a phone, a camera, a computer, or even a smart watch, will not perform its functions without software. Without software, a computer is just a piece of hardware; therefore, in order not to be just a piece of hardware, an operating system (OS) is installed on the computer. The phone also has an OS installed, which is popularly called “firmware”. Firmware is a set of hardware settings and software that are located in the device’s memory. So, in this article, let's take a closer look at why people change the firmware on their phone.

If a phone we just bought works great, doesn’t show any errors, “flies” and so on, then a phone that has served us for some time may slow down, work intermittently, be glitchy, have an outdated design, or a manufacturing defect. , do not install applications because the firmware is outdated, and so on and so forth. If in case of brakes you can do a complete reset of the phone settings, then when eliminating glitches, defects or unstable operation of the device, it is recommended to update the firmware to a newer version.

Typically, Android smartphones themselves offer to update automatically, but there are times when our smartphone is infected with a virus or does not turn on at all or freezes on loading, then in this case we will have to install the firmware ourselves.

1. Preparing and downloading everything you need

Before flashing the phone firmware, you need to download:

1. USB driver for Samsung phones(in our case, we used driver version 1.5.59.0 dated 01/08/2016 called SAMSUNG+USB+Driver+for+Mobile+Phones+1.5.59.0+SSPC.exe);
2. Firmware(we used the stock non-carrier firmware Android 4.3 XXUGOE1 (SER) (05/21/2015) Changelist 2833503, download);
3. Odin PC program(we used Odin3 v3.09.3).

2. Installing programs

First of all, you need to install the usb driver for Samsung phones, then unpack the Odin program into a directory without Cyrillic (Russian) letters, drive C is usually suitable. In the same folder where you unpacked Odin, put the firmware, unpack it and see 2 files: the first in .tar.md5 format, the second SS_DL.dll (the second dll file can be deleted).

3. Switch the smartphone to Download Mode

To do this, turn off the phone completely by pressing the power button. We wait until the device screen goes off.

4. Odin program and smartphone firmware process

So, now we launch the program by double-clicking on the Odin3 v3.09.exe file. The following window should appear:

In the "Option" section, leave the following checkboxes: "Auto Reboot" and "F. Reset Time". And in the “Files (Download)” section, click on the “PDA” button and select the file with the firmware. After the completed manipulations, connect the cable to the phone, in turn, the blue “ID: COM” label should light up in Odin.

Now the most important thing is to press the “Start” button and wait until the phone is flashed (1-5 minutes). When the phone is flashed in the program, the inscription "PASS" will light up at the top, and at the bottom " All threads completed. (succeed 1 / failed 0)", which means “Everything is just cool and without errors!”, Now we disconnect the cable from the phone, close the program and wait for the android to load on the phone itself.

1. Download everything we need to your computer

Driver SAMSUNG USB Driver for Mobile Phones v1.5.23.0.exe (14.65 MB) or Samsumg Kies (usually a disk with this program is included in the kit, or download the latest version from the official website)

The firmware itself is 4.1.2 I9300XXEMF6 (TMC) (06/27/2013)
Odin PC latest version Odin3_v3.07 (452.87 KB)

2. Then install all downloaded programs in this order:
The first on the list is SAMSUNG USB Driver for Mobile Phones, or completely Samsung Kies, although you will then have to temporarily “kill” the processes associated with the operation of this program through the Windows Task Manager. It’s not difficult to do this; it’s worth stopping everything where the word “Kies” appears.

Disable your antivirus, if you have one (I personally do without it)
Install drivers.

Unpack Odin (check that there are no folders with Cyrillic characters in the path to the program, this is important).
Place the firmware in any folder on your PC, say your desktop (check that there are no folders with Cyrillic characters in the path to the firmware).

3. Transfer the phone to Download Mode
– Turn off the phone completely, wait for it to turn off completely.

– Then, to enter the Download mode (firmware / download mode) of the Samsung GT-I9300 Galaxy S 3 phone, press three hardware buttons at the same time, this is volume down (down) + phone power key + menu button, and hold for a couple of seconds.

Enter download mode Samsung GT-I9300 Galaxy S 3

– After turning on the phone, release the buttons, a warning message with a yellow triangle should appear where they will ask us or we definitely want this, confirm the desire to enter download mode by pressing the “Volume up” (increase) key

– An image of a green robot appears on the smartphone screen, as in the picture.

Flashing mode Samsung GT-I9300 Galaxy S 3

Congratulations, let's move on to the next stage.

4. Odin program and firmware.
Find the downloaded archive with single-file firmware in .zip format and unpack it. We see two files: in .tar or .tar.md5 format.

Run Odin PC as administrator
In the PDA field we indicate the path to our firmware. Let's not touch anything else!

We connect the phone with the original cable, which is already in Download Mode, to a computer with Odin running and the selected firmware file, the field with the name of the port through which you connected lights up blue.

How to reflash Samsung GT-I9300 Galaxy S 3

Well, that’s all, feel free to click “Start”, and the process of flashing your Samsung GT-I9300 Galaxy S 3 phone will begin

During the flashing process, you will see many changing images in img format; system.img will take the longest to flash.
Then you will see this picture, and the phone will reboot into installation mode.

Afterwards the phone will reboot. It is possible that the Samsung message will hang for a long time (the first turn on after flashing lasts longer than usual, sometimes up to 10 minutes), but usually no longer than a minute.
Next, the phone will boot, you will see the welcome screen, and Odin will show you that everything was successful. The message “All threadscompleted.(succeed1 / failed 0)” will appear in the log.