Flash firmware on GreenBerry Passport P9
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How to flash GreenBerry Passport P9?
Why reinstall the firmware?
Errors begin to appear in the Android operating system.
Some installed applications stop opening.
Many programs from the Play Market do not work.
The phone shuts down and restarts for no apparent reason.
The phone is slow.
You are not satisfied with the functionality of the stock firmware.
Where can I find the firmware?
On the phone manufacturer's website.
On sites where developers post custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to another medium.
Insert an SD card into your phone to write the firmware to it.
Find out the exact model of your smartphone.
Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.
Download 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.
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.
Going to 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 a device, the program redirects the user to a web page to download the corresponding image file of the modified recovery environment. Download the suggested *.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. Select the file downloaded in the previous step.
After adding the image file to the program, click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK'.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..
Write the firmware to the SD card. Using a PC or laptop card reader.
Insert a 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, 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.
Everything is ready to start flashing. Press the 'Install' button.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the location where the files were copied. Press the 'OK' button.
Find the file we need 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, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
The completion of the installation procedure is indicated by the inscription 'Successful'.
Summary: Operating System: Android v4.4 (Kitkat); SIM Slot(s): Dual SIM, GSM+GSM; SIM Size: SIM1: Micro, SIM2: Micro; Network: 4G: Not Available, 3G: Available, 2G: Available; Colours: White; Screen Size: 5.0 inches; Screen Resolution: HD (720 x 1280 pixels); Pixel Density: 294 ppi; Display Type: IPS LCD; Touch Screen: Capacitive Touchscreen, Multi-touch; Processor: Quad core, 1.3 GHz; RAM: 1 GB; Internal Memory: 8 GB; Expandable Memory: Up to 32 GB; Resolution: 8 MP; Autofocus: Yes; Flash: LED Flash; Image Resolution: 3264 x 2448 Pixels; Camera Features: Digital Zoom; Resolution: 2 MP; Battery capacity: 3200 mAh; Type: Li-Polymer; SIM Size: SIM1: Micr ...
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