Flash firmware on Lava Iris 42
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How to flash Lava Iris 42?
Why reinstall the firmware?
Errors begin to appear in the Android operating system.
Some installed applications do not open.
Some applications from the Play Market do not start.
The phone turns off for no apparent reason.
The phone started to work slowly.
You are not satisfied with the functionality of the stock firmware.
Where can I find the firmware?
On the official website of your phone manufacturer.
On certain sites where developers post custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to your computer.
Insert SD card. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Find and download the archive with Firmware. And place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App to your phone from the Play Market. And install this app.
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.
After moving to the next screen, you need to select the 'TWRP FLASH' item and give the application root rights.
On the main screen of the application, the 'Select Device' drop-down list is available, in which you need to find and select the device model for installing the recovery.
After selecting a device, the application will direct the user to a web page to download the appropriate modified recovery environment image file. 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, press 'OK'.
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 SD memory card into the phone.
To reboot in recovery, it is convenient 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 tap 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.
Everything is ready to start flashing. Press the 'Install' button.
On the file selection screen, 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.
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 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 installation procedure is indicated by the inscription 'Successful'.
Summary: OS: Android 8.1 Oreo Go; Processor: MediaTek MT6737M; Processor clock: 1.30 GHz; Number of cores: 4; GPU: ARM Mali-T720 MP2; RAM: 1 GB; Internal memory: 8 GB; Memory cards: yes; microSD, microSDHC; (up to 32 GB); Display: Color / TFT; 16M colors; 480 x 854 px (5.00") 196 ppi; 66.3% screen-to-body ratio; Display protection: yes; Photo matrix: 5 Mpx; Flash: yes LED; Digital zoom: yes; Additional: FF; Photo matrix: 2 Mpx; Flash: yes LED; Digital zoom: yes; Additional: FF; A-GPS: yes; GPS module: yes; Bluetooth: yes v4.2; EDGE: yes; GPRS: yes; IrDA: yes; NFC: yes; USB: yes v2.0; WAP: yes v2.0; WiFi: yes v802.11 b/g/n; WiFi frequencies: 2.4 GHz; Hotspot WiFi: yes; Audio Jack: 3.5 mm; Java: yes A ...
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