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Flash firmware on CCIT A902

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How to flash CCIT A902?


Why reinstall the firmware?

Errors begin to appear in the Android operating system.

Apps won't open.

Many programs from the Play Market do not start.

The phone restarts or shuts down by itself.

The phone is slow.

You are not satisfied with the functionality of the stock firmware.





Where can I find the firmware?

On the website of your phone manufacturer.

On specialized services on which developers lay out 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 your phone to write the firmware to it.

Find out the exact model of your smartphone.

Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.

Download the archive with Firmware and 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.

On the next screen, you need to select the 'TWRP FLASH' item and give the application root-rights.

TWRP

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 program will redirect the user to a web page to download the corresponding image file of the modified recovery environment. Download the proposed *.img file.

When the file is loaded, 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.

Now press the 'FLASH TO RECOVERY' button and confirm your choice, press '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 and other necessary 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 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

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.


TWRP

On the file selection screen, at the very top there is a 'Storage' button for selecting an SD card.

Select the location where you copied the files. Press the 'OK' button.



TWRP

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, 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 v; SIM Slot(s): Single SIM; Colours: Black/White; Screen Size: 9 inches; Screen Resolution: 480 x 800 pixels; Pixel Density: 104 ppi; Display Type: LCD; Touch Screen: Capacitive Touchscreen; RAM: 512 MB; Internal Memory: 4 GB; Expandable Memory: Yes; Resolution: 2 MP; Flash: LED Flash; Image Resolution: 1600 x 1200 Pixels; Shooting Modes: Continuos Shooting; Camera Features: Digital Zoom, Smile detection; Resolution: 0.3 MP; Camera Features: Fixed Focus; Talktime: Up to Hours(2G); Wi-Fi: Wi-Fi 802.11; Wi-Fi Features: Mobile Hotspot; Bluetooth: No; ...

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