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Flash firmware on LG F620s Class

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How to flash LG F620s Class?


Why reinstall the firmware?

Errors periodically appear in the Android operating system.

Some applications do not open, reinstalling which does not lead to a positive result.

Many applications from the Play Market do not start.

The phone restarts by itself for no reason.

The phone is slow.

You have decided to try a different version of Android.





Where can I find the firmware?

On the official website of the 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 your computer.

Insert your SD card into your phone. It must have enough memory to fit the firmware.

Find out the exact model of your smartphone.

Fully charge your phone battery.

Download archive with Firmware.





Installing TWRP Recovery

Install the Official TWRP App via the Play Market. And run this application.

When you start the application for the first time, you must consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press the 'OK' button.

On the next screen, select 'TWRP FLASH' and give the application root rights.

TWRP

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, 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.

After the burn process is complete, 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 SD 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

TWRP

Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. This will delete all user data from the device, but avoid a wide range of software errors and other problems.

Press the 'Install' button to start the flashing.


TWRP

The file selection screen is displayed. 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.



TWRP

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 device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.

After completing the installation procedure, a 'Successful' message appears on the screen.





Summary: OS: Android 5.1 Lollipop; CPU frequency: 1200.0 MHz (4-core); Chipset: Qualcomm MSM8916; GPU: Adreno 306; RAM Memory: 1 GB; Display: LCD IPS Color (16M), 720x1280 px (5.0") 293ppi; Touch screen: yes; Protection: Corning Gorilla Glass 3; Built-in memory: 16 GB; Memory card: MicroSD/TransFlash max. 128 GB; Camera: 13.0 MPx; Resolution: 4416x2944 px; Flash: LED; Autofocus: yes; Optical zoom: no; Digital zoom: yes; Second camera: 7.99 Mpx; Resolution: 3264x2448 px; Bluetooth: 4.0; NFC: yes; EDGE: yes; GPRS: yes; GPS: yes; A-GPS: yes; Glonass: yes; LTE: LTE-FDD: 700, 850, 900, 1800, 2100, 2600; GSM: 850 900 1800 1900; HSDPA: 850 1900 2100 HSPA; HSUPA speed: 5,76 Mb/s; HSDPA speed: 42 Mb/s; USB: ...

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