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Flash firmware on Lava Z4

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How to flash Lava Z4?


Why reinstall the firmware?

Errors start to appear in the operating system.

Some installed applications stop opening.

Some applications from the Play Market do not start.

The phone restarts by itself for no reason.

The phone began to work slowly.

The OS does not match the system requirements of the smartphone.





Where can I find the firmware?

On the official website of the phone manufacturer.

On sites 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 SD card. An SD card is needed to write firmware to it.

Find information about 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. And run this application.

When you start the application for the first time, you must agree to install a new firmware and all the risks associated with this, as well as agree to grant the application Superuser rights and click the 'OK' button.

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

TWRP

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, go 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.

Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.

When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.

Copy the firmware and other necessary files to the SD card.

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. 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

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. Click the 'Install' button.


TWRP

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.



TWRP

Select the firmware file 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 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: Operating system: Android 10; Processor: Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53); Chipset: MediaTek Helio G35 (12 nm); GPU: PowerVR GE8320; Internal memory: 64GB 4GB RAM; External memory: microSDXC (dedicated slot); Type: IPS LCD; Size: 6.51 inches, 102.3 cm 2; Resolution: 720 x 1600 pixels, 20:9 ratio; Protection: Corning Gorilla Glass 3; Body build: Glass front, plastic back, plastic frame; SIM: Dual SIM (Nano-SIM, dual stand-by); Dimensions: 164.5 x 75.8 x 9 mm (6.48 x 2.98 x 0.35 in); Weight: 190 g (6.70 oz); Colors: Blue, Red; 2G Network: GSM 900 / 1800 - SIM 1 & SIM 2; 3G Network: HSDPA 900 / 2100; 4G Network: 1, 3, 5, 8, 40, 41; WLAN: Wi-Fi 802.11 b/g/n, Wi-Fi Direct, ...

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