Flash firmware on BLU G91s
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How to flash BLU G91s?
Why reinstall the firmware?
The operating system keeps getting errors.
Some applications stop opening.
Some programs from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone is slow.
You want to update the firmware, as it does not suit you in terms of functionality.
Where can I find the firmware?
On the official website of the 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, contacts and photos 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's battery.
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.
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, click 'Select Device', and find 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. Select the file downloaded in the previous step.
Press the 'FLASH TO RECOVERY' button and confirm your choice.
After the burn process is complete, 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 memory card into your phone.
To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. 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.
You can start flashing. Click the 'Install' button.
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 you copied the files..
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 corrupted 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.
When the procedure for installing the firmware is completed, the message 'Successful' appears on the screen.
Summary: OS: Android 11; Chipset: Mediatek MT6769V/CU Helio G80 (12 nm); CPU: Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55); GPU: Mali-G52 MC2; Type: IPS LCD; Screen Size: 6.8 inches, 109.8 cm 2 (~85.4% screen-to-body ratio); Resolution: 1080 x 2460 pixels (~395 ppi density); Card slot: microSDXC; Internal: 128GB 4GB RAM; Quad camera: 48 MP, f/1.8, (wide), 1/2.0, 0.8Вµm, PDAF 5 MP, f/2.2, (ultrawide) 2 MP, f/2.4, (depth); Features: LED flash, HDR, panorama; Video: 1080p@30fps; Single camera: 13 MP, f/2.0; Video: 1080p@30fps; Loudspeaker: Yes; 3.5mm jack: Yes; Sensors: Fingerprint, accelerometer, gyro, proximity, compass; Type: Li-Po 6000 mAh, non-removable; Charging: Fast charging 18W; Dim ...
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