Flash firmware on Polaroid PRO4020PR001
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How to flash Polaroid PRO4020PR001?
Why reinstall the firmware?
Errors begin to appear in the Android OS.
Some applications stop opening.
Many applications from the Play Market do not start.
The phone restarts by itself for no reason.
The phone slows down a lot during operation.
You are not satisfied with the functionality of the stock firmware.
Where can I find the firmware?
On the official website of the manufacturer.
On Internet 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 the gadget. It must have enough memory for the firmware.
Remember your smartphone model.
Fully charge your device's battery.
Download archive with Firmware.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone. And run this application.
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.
In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, the 'Select Device' drop-down list is available, in which you need to find and select the device model for installing the recovery.
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, return 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.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
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 necessary files to the SD memory card. Using a PC or laptop card reader.
Insert a SD memory card into the phone.
To reboot in recovery, it is convenient 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 tap 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.
Everything is ready to start flashing. Press 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, 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, accompanied by logging and filling in the progress bar.
The completion of the installation procedure is indicated by the inscription 'Successful'.
Summary: Type: Mobile; Battery: Li-Ion 1000 mAh; Smart Phone OS: Android 4.2.2; Dimensions: 110 x 69.2 x 9.9 mm; Formfactor: Bar; Keyboard: Qwerty; Sidekeys: Volume; Softkeys: 2; Weight: 88 g; Color: Yes; Colors: 65K; Other: Qwerty Keyboard; Pixel aspect ratio: 1.00; Resolution: 854x480; Display PPI: 174; Screen Size: 2.3; Type: TFT; Audio: AAC, AAC+, AMR, AWB, MP3; Camera: 1.3MP, 1280x960; Other: Macro Mode, Digital Zoom, Scene Mode; Videocapture: YES, VGA@30fps; Videoplayback: AVI, RM, RMVB, MP4; Connectors: 3.5mm Audio, MicroUSB 2.0; Network: GSM850, GSM900, GSM1800, GSM1900, Bluetooth; Features: Loudspeaker, Speakerphone, Microphone, Vibration; Memory Internal: 64MB; ...
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