The OS does not match the system requirements of the smartphone.
Where can I find the firmware?
On the official website of your phone manufacturer.
On specialized services on which developers lay out 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 an SD card into your phone to write the firmware to it.
Find information about your smartphone model.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
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 consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press 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, select 'Select Device', and find 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.
When the file is loaded, return 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.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..
Write the firmware and other necessary files to the SD card. Using a PC or laptop card reader, it will be much faster.
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
Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. You will delete all user data from the phone, this will avoid software errors and other problems.
Now you can start flashing. Click 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.
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 writing files to the phone's memory will begin, this is 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: Colors: Black; Dimensions: 144 x 74 x 10 mm, Exactly 144.5 x 73.6 x 10 mm; Weight: 170g; Type: LCD capacitive touchscreen; Display Colors: 16M Colors; Size: 5 Inch; Screen-to-body ratio: 61 to 70 Percent, (~64.8% screen-to-body-ratio); Resolution: 480 x 854 pixels; Pixel Density: 125 to 200 ppi, (~196 ppi Pixel Density); Primary: 5.0 Megapixels, 2592 x 1944 Pixels; Flash: Yes; Video Recording: Yes; Secondary: VGA; Audio Playback: WAV, AAC, AMR, MP3, WMA, MIDI, FLAC, OGG; Ring Tones: Vibration, MP3 ringtones, WAV; FM Radio: Yes; 3.5mm jack: Yes; Operating System: Android 4.4 KitKat; CPU: 1.2 GHz Quad Core Processor; RAM: 512 MB; Internal Storage: 4 GB; Card Slot: MicroSD ...
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