Flash firmware on Samsung S7390
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How to flash Samsung S7390?
Why reinstall the firmware?
Errors constantly appear in the Android operating system.
Some installed applications do not open.
Some programs from the Play Market do not start.
The phone restarts by itself for no reason.
The phone began to slow down a lot.
You are not satisfied with the functionality of the stock (official) firmware.
Where can I find the firmware?
On the official website of your phone manufacturer.
On specialized resources where users post custom or official OS.
What should be done before installing the firmware?
Create a backup copy of user data and transfer it to your computer.
Insert an SD card into your phone to write the firmware to it.
Determine your smartphone model.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Find and download the archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone. And run this application.
When you start the application for the first time, you need to give consent to future manipulations, as well as to give consent to granting the application Superuser rights and click the 'OK' button.
After moving to the next screen, you need to select the 'TWRP FLASH' item and give the application root rights.
On the main screen of the application, click on the 'Select Device' drop-down list, and select your phone model.
After selecting a device, the application will direct the user to a web page to download the appropriate modified recovery environment image file. Download the suggested *.img file.
After downloading the image file, go 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.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.
Copy the required files to the SD card. Using a PC or laptop card reader, it will be much faster.
Insert a SD 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. Open the menu and select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button.
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.
On the file selection screen, at the very top there is a 'Storage' button for selecting an SD card.
Select the location where you copied the files..
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.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: OS: Android 4.1.2 Jelly Bean; Processor: 1,00 GHz; RAM memory: 512 MB; Internal memory: 4 GB; Memory cards: microSD, microSDHC, microSDXC, max 64 GB; Main display: TFT 16M colors 480 x 800 px (4.00") 233 ppi; Touchscreen: Yes; Digital camera: 3 Mpx, 2048x1536 px; Video: MPEG4, H.263, H.264 - 30 fps; MP3: Yes; Speakerphone: Yes; Radio: Yes; Bluetooth: Yes; NFC: -; GSM frequencies: 850/900/1800/1900; Standard UMTS: 900/2100; GPS: Yes; GLONASS: Yes; WiFi: Yes, v802.11 b/g/n; EDGE: Yes; GPRS: Yes; USB Yes, v2.0; WAP: Yes, v2.0; IrDA: -; LTE: -; HSCSD: -; HSDPA: Yes; HSPA: -; HSPA: Yes; HSUPA: Yes; Calendar: Yes; Java: Yes, Dalvik; Watch: Yes; Dimensions: 121,5 x 63,1 x 10,85 mm; Weight: 126 g; ...
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