Flash firmware on NUU Mobile A5L
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How to flash NUU Mobile A5L?
Why reinstall the firmware?
Errors start to appear in the operating system.
Some applications stop opening.
Some programs from the Play Market do not start.
The phone restarts by itself for no reason.
The phone began to work slowly.
The OS does not match the system requirements of the smartphone.
Where can I find the firmware?
On the official Internet resource of the 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 SD card. An SD card is needed to write firmware to it.
Find information about your smartphone model.
Charge your phone fully.
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.
After moving to the next screen, select the 'TWRP FLASH' item 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 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.
When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now 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. 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 delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.
Now you can start flashing. Click the 'Install' button.
The file selection screen appears. 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 flashing the phone will begin, 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: Display size: 5.5 inches; Display dots per inch: 195.12 DPI; Display Type: IPS; Display aspect ratio: 18: 9; Display Resolution: 960 x 480 px; Display finish: 2.5D glass; Display total pixels: 460800; Operating System: Android 8.1 Oreo (Go Edition); Processor: MediaTek; CPU Cores: 4; Processor Speed: 1.3GHz; RAM: 1GB; Thickness: 9.9 mm; Width: 70.4 mm; Height: 145.3 mm; Available colors: Gray, Silver; Camera Resolution: 8-megapixel; Camera flash: LED; Camera Options: Beauty Mode, HDR; Max Video Resolution: 1280 x 720 px; Selfie Cam Resolution: 2-megapixel; Base technology: GSM (850/900/1800/1900MHz); 3G Networks: WCDMA (850/1900/2100MHz); 4G Networks: LTE (2/4/5/7/12/1 ...
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