Flash firmware on QMobile QTab Q400
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How to flash QMobile QTab Q400?
Why reinstall the firmware?
Errors in the Android OS start to appear regularly.
Some applications stop opening.
Some programs from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone slows down a lot during operation.
You want to update the firmware, as it does not suit you in terms of functionality.
Where can I find the firmware?
On the official Internet resource of the phone manufacturer.
On specialized 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 an SD card into the gadget. It must have enough memory for the firmware.
Find information about your smartphone model.
Charge your phone fully.
Find and download the archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone.
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.
After moving to the next screen, select the 'TWRP FLASH' item and provide the application with root rights.
On the main screen of the application, click 'Select Device', and find your phone model.
After selecting the phone, the application will redirect 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. Select the file downloaded in the previous step.
Press the 'FLASH TO RECOVERY' button and confirm your choice.
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 required files to the SD card. Using a PC or laptop card reader, it will be much faster.
Insert a memory card into your phone.
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 the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically..
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.
Now you can start flashing. Click the 'Install' button.
The file selection screen appears. 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..
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 corrupted 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.
When the procedure for installing the firmware is completed, the message 'Successful' appears on the screen.
Summary: 2G Network: GSM900/1800/1900, WCDMA 900/2100; 3G Network: No; 4G Network: No; SIM: Dual-Sim; Announced: August, 2014; Dimensions: 113 x 192 x 10.4 mm; Weight: 170 g; Type: 576 x 1024 pixels (~ 168 ppi ); Size: 7.0 inchs; Multitouch: Yes; Alert types: Vibration, Polyphonic, MP3, WAV; Loudspeaker: Yes; 3.5mm jack: Yes; Card slot: Yes, Upto 32 GB; Internal: 8 GB, 1 GB RAM; GPRS: Yes; EDGE: Yes; WLAN: Yes; Bluetooth: Yes; USB: Yes; Primary: 2.0 Mega Pixel , Auto Focus, Face detection,ISO; Features: Basic Camera quality; Video: Yes; Secondary: Yes, VGA (0.3 MP); Operating system (OS): Android 4.2 (Jelly bean); CPU: 1.3 Ghz Dual-Core Processor; GPU: ARM Mali 400 MP; Sens ...
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