Flash firmware on LG Optimus L9 T-Mobile
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How to flash LG Optimus L9 T-Mobile?
Why reinstall the firmware?
Errors in the operation of the Android OS begin to appear.
Some installed applications stop opening.
Some 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 phone manufacturer's website.
On certain 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 SD card. An SD card is needed to write firmware to it.
Remember your smartphone model.
Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.
Find and download the archive with Firmware. And place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone.
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.
Going to the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, select 'Select Device', and find your phone model.
After selecting a device, the program redirects the user to a web page to download the corresponding image file of the modified recovery environment. Download the suggested *.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.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Transfer the necessary files 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, you need to delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.
Now you can start flashing. Press the 'Install' button.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the location where you copied the files. Press the OK button.
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 flashing the phone will begin, 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: OS: Android (4.1.2, 4.0); Dimensions: 5 megapixels; Flash: LED; Features: Autofocus, ISO control, White balance presets, Burst mode, Digital zoom, Geo tagging, Panorama, Voice activation; Camcorder: 1920x1080 (1080p HD); Features: Video calling; Front-facing camera: 0.3 megapixels VGA; System chip: TI OMAP4430; Processor: 1024 MB RAM (Dual-channel) / LPDDR2; Built-in storage: 4 GB; Storage expansion: microSD, microSDHC up to 32 GB; Talk time: 5.00 hoursthe average is 11 h (675 min); Stand-by time: 28.0 days (672 hours)the average is 20 days (477 h); Capacity: 2150 mAh; Music player: ; Filter by: Album, Artist, Playlists; Features: Album art cover, Background playback; Suppor ...
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