Flash firmware on LG Q9 One
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How to flash LG Q9 One?
Why reinstall the firmware?
Errors start to appear in the operating system.
Some applications stop opening.
Many programs from the Play Market do not work.
The phone restarts or shuts down randomly.
The phone slows down a lot during operation.
The OS does not match the system requirements of the smartphone.
Where can I find the firmware?
On the official Internet resource of the phone manufacturer.
On sites where developers 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.
Download archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Download and install the Official TWRP App from the Play Market.
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, select '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, return 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, press 'OK'.
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.
Write the firmware to the SD 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
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 the files were copied. Press the 'OK' button.
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 writing files to the phone's memory will begin, accompanied by logging and filling in the progress bar.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Brand & Model: LG Q9 One; Product Release Date: 12 February, 2019; Fingerprint Sensor: Yes; Waterproof: Yes; Display Type: IPS capacitive touchscreen; Display Size: 6.1 inches FHD; Resolution: 1440 x 3120 Pixels, 24 bit color depth; Multitouch Input: Yes; Display Colors: 16M Colors; Pixel Density (In PPI): ~563 PPI Pixel Per Inch; Touch Screen: Multi Touch Support; Touchscreen Technology: Capacitive Touch; Display Protection: Yes; Features: QHD display~ 563 PPI Pixel DensityCapacitive Multi-touchAlways-On DisplayScratch resistantFull VisionHDR10; Secondary Display: No; Screen to Body Ratio: 83.19%; Camera Type: Dual Camera Set UP (One Front One Back); Rear Camera: 16 Me ...
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