Flash firmware on TCL A990
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How to flash TCL A990?
Why reinstall the firmware?
Errors constantly appear in the Android OS.
Apps won't open.
Many applications from the Play Market do not start.
The phone restarts or shuts down for no reason.
The phone slows down a lot during operation.
You are not satisfied with the possibilities of the stock firmware.
Where can I find the firmware?
On the website of your 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 and transfer it to another medium.
Insert an SD card into the gadget. It must have enough memory for the firmware.
Determine your smartphone model.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Download archive with Firmware.
Installing TWRP Recovery
Download the Official TWRP App from the Play Market. Download, install and launch the application..
At the first start, you need to give consent to future manipulations, as well as consent to granting the Superuser rights to the application. 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.
On the main screen of the application, click 'Select Device', and select your phone model.
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.
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 that you are ready to start the procedure - press 'OK' in the question window.
The recording process is very fast, and upon completion, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.
Copy the necessary files to the SD memory card. Using a PC or laptop card reader.
Insert a memory card into the device.
To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. Select 'Reboot' and then click on the 'REBOOT RECOVERY' button.
Firmware via TWRP
Before flashing, it is recommended to clear the 'Cache' and 'Data' sections. This will delete all user data from the device, but avoid a wide range of software errors and other problems. You must press 'WIPE' on the main screen.
You can start flashing. Click the 'Install' button.
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.
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, accompanied by logging and filling in the progress bar.
After the firmware installation procedure is completed, the 'Successful' message appears on the screen.
Summary: Design: Classic; SIM cards standard: Mini Sim - Regular; GSM: 850 900 1800 1900; Other: WCDMA; Dimensions (H/L/W): 116 x 62.2 x 12.2 mm, vol. 88 cm³; Display: TFTColor (260K) 320x480px (3.5") 165ppi; Touch screen: yes; Weight: 145 g; Battery: Li-Ion 1300 mAh; Built-in memory: 512.0 MB; Memory card: MicroSD; RAM memory: 512 MB; Operating system: Android 2.2; Chipset: Qualcomm Xiaolong; CPU 1 frequency: 600.0 MHz(1-core); GPU Type: Qualcomm Adreno200; GPRS: yes; EDGE: yes; HSDPA: no; HSCSD: no; Wi-Fi: yes; Bluetooth: yes; USB: 2.0; IrDA: no; WAP: 2.0; XHTML: yes; SyncML: no; Data and fax mode: yes; Camera: 4.8 MPx; Resolution: 2560x1920px; Digital zoom: yes; ...
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