Flash firmware on Nokia 4.2
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How to flash Nokia 4.2?
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 or shuts down by itself.
The phone slows down a lot during operation.
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 all personal information: contacts, photos and transfer it to another computer.
Insert an SD card into the gadget. It must have enough memory for the firmware.
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
Download the Official TWRP App to your phone from the Play Market. And install this app.
At the first start, you need to give consent to future manipulations, as well as consent to granting the Superuser rights to the application. Check the checkboxes and press 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.
Now press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
The recording process is very fast, and upon completion, 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. 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, 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. 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 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.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Display size: 5.7 inches (actual diagonal is 5.71 inches); Display dots per inch: 270 DPI; Display Type: A-Si TFT; Display aspect ratio: 19: 9; Display Resolution: 1520 x 720 px; Display finish: 2.5D glass; Display total pixels: 1094400; Operating System: Android 9.0 Pie; Processor: Qualcomm Snapdragon 439; CPU Cores: 8; Processor Speed: 2GHz (top speed according to Qualcomm); RAM: 3GB (2GB version also available -- both versions have DDR3 RAM types); Weight (grams): 161g; Thickness: 8.39 mm; Width: 71.3 mm; Height: 148.95 mm; Grams per cubic cm: 0.18 g/cu cm; Available colors: Black, Pink Sand; Ambient light detector: yes; Camera Resolution: 13-megapixel (combined with a ...
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