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Flash firmware on AGM H3

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How to flash AGM H3?


Why reinstall the firmware?

Errors begin to appear in the Android operating system.

Some installed applications do not open.

Some applications from the Play Market do not start.

The phone turns off for no apparent reason.

The phone started to work slowly.

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





Where can I find the firmware?

On the official website of your phone manufacturer.

On certain 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 your computer.

Insert your SD card into your phone. An SD card is needed to write 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.

Find and download the archive with Firmware. And 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 the firmware, as well as agree to grant the application Superuser rights and click the 'OK' button.

After moving to 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 a device, the application will direct the user to a web page to download the appropriate modified recovery environment image file. 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. Then we tell the program the path where the file loaded in the previous step is located.

Now press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.

When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.

Transfer the necessary files to the SD card. Using a PC or laptop card reader.

Insert a memory card into the device.

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 delete all user data from the phone, this will avoid errors in the software, as well as other problems. Press 'WIPE' on the home screen.

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 flashing the phone 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: OS: Android 11; Processor: MediaTek Helio P22 MT6762; Processor clock: 2.00 GHz; Number of cores: 8; GPU: PowerVR GE8320 @650 MHz; RAM: 4 GB; Internal memory: 64 GB; Memory cards: yes; microSD, microSDHC, microSDXC; Display: Color / IPS TFT; 16M colors; 720 x 1440 px (5.70") 282 ppi; Display protection: yes; Type: Standard; Photo matrix: 12 Mpx; Sensor size: 1/2,8; Flash: yes LED; Digital zoom: yes; Number of lenses: 6; Video formats: H.263, H.264, MPEG4; Additional: AF; Type: Portrait; Flash: yes; Digital zoom: yes; Additional: FF; A-GPS: yes; GPS module: yes; Bluetooth: yes; EDGE: yes; GPRS: yes; GLONASS: yes; Beidou: yes; IrDA: yes; NFC: yes; USB: yes v2.0; Type-C; WAP: yes v2.0; WiFi: y ...

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