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Flash firmware on Rakuten Mini

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How to flash Rakuten Mini?


Why reinstall the firmware?

Errors constantly appear in the Android operating system.

Some applications stop opening.

Some programs from the Play Market do not start.

The phone turns off for no apparent reason.

The phone began to work slowly.

You are not satisfied with the functionality of the stock (official) firmware.





Where can I find the firmware?

On the official website of the manufacturer.

On sites where third-party developers and phone manufacturers post custom or official OS.


What should be done before installing the firmware?

Back up your contacts and user data and transfer it to your computer.

Insert your SD card into your phone. It must have enough memory to fit the firmware.

Determine your smartphone model.

Fully charge your device's battery.

Find and download the archive with Firmware. Place it on the SD card.





Installing TWRP Recovery

Install the Official TWRP App via the Play Market. And run this application.

When you start the application for the first time, you must agree to install a new firmware and all the risks associated with this, as well as agree to grant the application Superuser rights and click the 'OK' button.

In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.

TWRP

On the main screen of the application, click on the 'Select Device' drop-down list, and select your phone model.

After selecting the phone, the application will redirect the user to a web page to download the modified recovery environment image file. Download the proposed *.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. Then we tell the program the path where the file loaded in the previous step is located.

Now press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.

When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.

Copy the firmware and other necessary files to the SD card.

Insert a memory card into the device.

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

TWRP

Before flashing, it is recommended to clear the 'Cache' and 'Data' sections. This will delete all user data from the device, but avoid a wide range of software errors and other problems. You must press 'WIPE' on the main screen.

Now you can start flashing. Press the 'Install' button.


TWRP

The file selection screen is displayed. At the very top is the 'Storage' button, select the location where the firmware file is located.

Select the location where the files were copied. Press the OK button.



TWRP

Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, you need to check the item 'Zip signature verification', which will avoid using damaged files during recording.

The procedure for writing files to the phone's memory will begin, accompanied by logging and filling in the progress bar.

After completing the installation procedure, a 'Successful' message appears on the screen.





Summary: OS: Android 9.0 Pie; Processor: Qualcomm Snapdragon 439; Processor clock: 2.00 GHz; Number of cores: 8; GPU: Adreno 505; RAM: 3 GB; Internal memory: 32 GB; Memory cards: yes; Display: Color / TFT; 16M colors, 60 Hz; 720 x 1280 px (3.60") 408 ppi; 63.0% screen-to-body ratio; Display protection: yes; Type: Standard; Photo matrix: 16 Mpx; Flash: yes LED; Digital zoom: 4x; Video formats: H.264, H.265, MPEG4 - 30 fps; Video resolution: 1920x1080; Additional: AF, f/2.0; Type: Portrait; Photo matrix: 5 Mpx; Flash: yes; Digital zoom: 4x; Additional: FF, f/2.2; A-GPS: yes; GPS module: yes; Bluetooth: yes v5.0; EDGE: yes; GPRS: yes; IrDA: yes; NFC: yes; USB: yes v2.0; Type-C; WAP: yes; WiFi: yes v802 ...

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