Flash firmware on Samsung Galaxy S III I9305
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How to flash Samsung Galaxy S III I9305?
Why reinstall the firmware?
Errors in the operation of the Android OS begin to appear.
Some applications will not open.
Many programs from the Play Market do not start.
The phone restarts for no reason.
The phone is slow.
You want to update your firmware.
Where can I find the firmware?
On the official website of the manufacturer.
On specialized services on which developers lay out custom or official OS.
What should be done before installing the firmware?
Back up your phone's user data.
Insert an SD card into your phone to write the firmware to it.
Remember your smartphone model.
Charge your phone fully. If the battery runs out during boot, the device will no longer turn on. It will be difficult to restore it.
Download the archive with Firmware and place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App from the Play Market. And install it.
When you start the application for the first time, you must consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press the 'OK' button.
In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, select 'Select Device', and find your phone model.
After selecting the phone, the program will redirect the user to a web page to download the corresponding image file of the modified recovery environment. Download the proposed *.img file.
When the file is loaded, return to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Select the file downloaded in the previous step.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..
Write the firmware and other necessary files to the SD card. Using a PC or laptop card reader, it will be much faster.
Insert a memory card into the phone.
To reboot into recovery, you need to use a special item in the Official TWRP App menu, accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. We open the menu, select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically.
Firmware via TWRP
Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. You will delete all user data from the phone, this will avoid software errors and other problems.
Now you can start flashing. Press the 'Install' button.
The file selection screen is displayed. At the very top is the 'Storage' button, which allows you to switch between types of memory.
Select the location where you copied the files. Press the 'OK' button.
Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, as well as the item 'Zip signature verification'. This item should be checked by placing a cross in the check-box, which will avoid using damaged files when writing to the phone's memory sections.
The procedure for writing files to the phone's memory will begin, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Type: Smartphone; Smart Phone OS: Android; OS ver: Android 4.1.1 Jelly Bean; SIM: Micro SIM; CPU: Quad-core 1.4 GHz Cortex-A9; Processor Speed: 1.4 GHz; Storage: 16GB; RAM: 2GB; External Storage: microSD up to 64 GB; Battery: Li-Ion2100 mAh batteryUp to580 h (2G) /Up to390 h (LTE)/510 h (3G)Up to16 h (2G) /Up to11 h (3G); Screen Size: 4.8 inches; Resolution: 1280 x 720; Main Camera: 8 MP; Front Camera: 1.9 MP; Features: GPS, Bluetooth; Dimensions: 136.6 x 70.6 x 8.6 mm (5.38 x 2.78 x 0.34 in); Weight: 131 g; ...
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