Errors periodically appear in the Android operating system.
Some installed applications do not open.
Some applications from the Play Market do not start.
The phone restarts by itself for no 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 Internet resource 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 your SD card into your phone. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Fully charge your phone battery.
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 the firmware, as well as agree to grant the application Superuser rights and click the 'OK' button.
After moving to the next screen, select the 'TWRP FLASH' item 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 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, 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. Click 'OK'. 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. 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 errors in the software, as well as other problems. Press 'WIPE' on the home screen.
Press the 'Install' button to start the flashing.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the location where the files were copied.
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, this is 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: Operating System: Android v6.0 (Marshmallow); SIM Slot(s): Dual SIM, GSM GSM; Network: 4G: Not Available, 3G: Available, 2G: Available; Fingerprint Sensor: No; Colours: Black; Screen Size: 5.0 inches (12.7 cm); Screen Resolution: Full HD (1080 x 1920 pixels); Pixel Density: 441 ppi; Display Type: IPS LCD; Touch Screen: Yes Capacitive Touchscreen, Multi-touch; Processor: Quad core, 1.3 GHz; RAM: 1 GB; Internal Memory: 16 GB; Expandable Memory: Yes Up to 32 GB; Resolution: 5 MP Primary Camera; Flash: Yes LED Flash; Image Resolution: 2592 x 1944 Pixels; Camera Features: Digital Zoom; Resolution: 2 MP Front Camera; Autofocus: No; Flash: Yes LED Flash; Capacity: 2200 mAh; ...
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