Errors periodically appear in the Android operating system.
Some applications will not open.
Some programs from the Play Market do not start.
The phone shuts down and restarts for no apparent reason.
The phone started to work slowly.
You have decided to try a different version of Android.
Where can I find the firmware?
On the official website of the manufacturer.
On specialized resources where users post custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to another medium.
Insert SD card. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Charge your phone fully. If the battery runs out during boot, the device will no longer turn on. It will be difficult to restore it.
Find and download the archive with Firmware. 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.
In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, click on the 'Select Device' drop-down list, and select your phone model.
After selecting the phone, the program will redirect the user to a web page to download the corresponding image file of the modified recovery environment. Download the proposed *.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. Select the file downloaded in the previous step.
After adding the image file to the program, click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK'.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Copy the required files to the SD card. Using a PC or laptop card reader, it will be much faster.
Insert a 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
Before flashing, you need to delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.
Press the 'Install' button to start the flashing.
The file selection screen is displayed. At the very top is the 'Storage' button, which allows you to switch between types of memory.
Select the location where you copied the files..
Find the file we need 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.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Smart Phone OS: Android; Smart Phone OS ver.: v5.1 (Lollipop); Shape: Bar; SIM: Nano-SIM; Processor Speed: v5.1 (Lollipop); Internal Storage: 32GB; RAM: 3GB; External Storage: microSD, up to 128 GB; Battery life: Stand by Up to 375 h (3G)/Talk time Up to 10 h (3G); Screen Size: Stand by Up to 375 h (3G)/Talk time Up to 10 h (3G); Resolution: 2560x1440; Touch Screen: yes; Screen Type: True HD-IPS LCD capacitive touchscreen, 16M colorsCorning Gorilla Glass 4; Pixels: Rear: 16MP, Secondary: 8 MP; Flash: yes; Image Stabilization: yes; Waterproof: ; GPS: yes; Dimensions (WxHxD): 148.9 x 76.1 x 9.8 mm (5.86 x 3.00 x 0.39 in); Weight: 155g (5.47 oz); ...
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