Flash firmware on Tecno S9
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How to flash Tecno S9?
Why reinstall the firmware?
Errors constantly appear in the Android operating system.
Some applications do not open, reinstalling which does not lead to a positive result.
Some programs from the Play Market do not start.
The phone restarts for no reason.
The phone began to slow down a lot.
You are not satisfied with the functionality of the stock (official) firmware.
Where can I find the firmware?
On the website of your phone manufacturer.
On sites where third-party developers and phone manufacturers post custom or official OS.
What should be done before installing the firmware?
Back up your phone's user data.
Insert your SD card into your phone. An SD card is needed to write firmware to it.
Determine your smartphone model.
Fully charge your device.
Find and download the archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App from the Play Market. And install it.
When you start the application for the first time, you need to give consent to future manipulations, as well as to give consent to granting the application Superuser rights and click the 'OK' button.
On the next screen, you need to select the 'TWRP FLASH' item and give the application root-rights.
On the main screen of the application, click on the 'Select Device' drop-down list, and select 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, go 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.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.
Copy the firmware and other necessary files to the SD card.
Insert a memory card into the 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. Open the menu and select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button.
Firmware via 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.
The file selection screen is displayed. At the very top is the 'Storage' button, which allows you to switch between types of memory.
Select the location where the files were copied. Press the OK button.
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 flashing the phone will begin, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: 2G Network: GSM 900 / 1800; 3G Network: HSDPA 2100; 4G Network: No; SIM: Mini SIM; Dimensions: 193 x 111 x 9.5; Keyboard: Touchscreen; Colors: White, Black; Cover: Plastic; Type: TFT capacitive touchscreen with 256,000 colors; Screen Size: 7.0 inches, 600 x 1024 pixels, 170 pixels per inch (PPI); Card slot: MicroSD, up to 32GB; Internal: 8GB; Operating System: Android 4.2.2 Jelly Bean; Processors: 1.3GHz dual-core CPU, MediaTek MT6572 chipset; RAM: 1GB; Alert types: Vibration, MP3 ringtones; Loudspeaker: Yes; Audio port: 3.5mm jack; 2G: GPRS - up to 85.6 kbps; EDGE - up to 236.8 kbps; 3G: Up to 22.2 mbps downlink; Up to 5.76 mbps uplink; 4G: No; WI-FI: Wi-Fi 802.11 b/g/n ...
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