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Flash firmware on Tengda S9800

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How to flash Tengda S9800?


Why reinstall the firmware?

Errors in the operation of the Android OS begin to appear.

Some applications do not open, reinstalling which does not lead to a positive result.

Many applications from the Play Market do not start.

The phone restarts or shuts down randomly.

The phone started to work slowly.

You want to update your firmware.





Where can I find the firmware?

On the official website of the phone 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, contacts and photos and transfer it to your computer.

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

Remember your smartphone model.

Fully charge your phone battery.

Download archive with Firmware.





Installing TWRP Recovery

Download and install the Official TWRP App from the Play Market.

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.

On the next screen, select 'TWRP FLASH' and give the application root rights.

TWRP

On the main screen of the application, select 'Select Device', and find your phone model.

After selecting a phone, the application will direct 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.

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.

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

Insert a memory card into your 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

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.

Now you can start flashing. Press the 'Install' button.


TWRP

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.



TWRP

Find the file we need 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 corrupted files when writing to the phone's memory sections.

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 firmware installation procedure is indicated by the inscription 'Successful'.





Summary: Size: 72.0 mm x 140.0 mm x 10.0 mm; Weight: 160 g; Frame size: 0.33 mm; Usable surface: 67 %; Diagonal: 5"; Screen Type: LCD IPS TFT; Screen Resolution: 480 x 854 px; Density: Low Density, 196 Pixels per inch differentiable less than 60 cm away,; Others: Capacitive, Multi-touch; Operating System: Android 4.2.2 Jelly Bean; Model: MediaTek MT6592; CPU: ARM Cortex-A7; Type: Octa-Core; Frequency: 1.7 GHz; GPU: ARM Mali-450 MP4; RAM: 1 GB; Antutu score: 27.629 Overall performance better than 56% of smartphones; Capacity: 8 GB (Capacity with the OS (depends on the brand and ROM version): 6-7 GB); More or less equivalent to: 1454 Songs, 3200 Photos and 114 Videos; SD Slot: Yes I ...

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