Flash firmware on BItel B9503
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How to flash BItel B9503?
Why reinstall the firmware?
Errors begin to appear in the Android OS.
Some installed applications do not open.
Many applications from the Play Market do not start.
The phone restarts or shuts down by itself.
The phone began to slow down a lot.
You are not satisfied with the functionality of the stock firmware.
Where can I find the firmware?
On the official Internet resource of the phone manufacturer.
On specialized services on which various developers lay out custom or official OS.
What should be done before installing the firmware?
Create a backup copy of all personal information: contacts, photos and transfer it to another computer.
Insert your SD card into your phone. An SD card is needed to write firmware to it.
Remember your smartphone model.
Fully charge your phone battery.
Download 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 need to give consent to future manipulations, as well as to give consent to granting 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, 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.
When the file is loaded, you need to 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.
Now 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 can be considered complete.
Transfer the firmware and other necessary files to the SD card.
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 errors in the software, as well as other problems. Press 'WIPE' on the home screen.
Everything is ready to start flashing. Press the 'Install' button.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the storage to which the files were copied. Press the OK button.
Select the firmware file 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 damaged files during recording.
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.
The completion of the installation procedure is indicated by the inscription 'Successful'.
Summary: Type: Mobile; Smart Phone OS: Android 6.0; Formfactor: Bar; Keyboard: Screen; Sidekeys: Volume, Power; Softkeys: 3; Color: Yes; Colors: 16M; Other: Capacitive Touchscreen, Multitouch; Pixel aspect ratio: 1.50; Resolution: 320x533; Display PPI: 187; Screen Size: 5; Type: TFT; Audio: MP3, WAV; Camera: 8MP, 3264x2448; Other: Video Calling, Macro Mode, Music Player, Video Player; Secondcamera: 2MP, 1600x1200; Videocapture: YES, HD@30fps; Videoplayback: MP4; Connectors: 3.5mm Audio, MicroUSB; Network: GSM850, GSM900, GSM1800, GSM1900, WCDMA, UMTS, HSDPA, WIFI, 802.11b, 802.11g, 802.11n; Features: Loudspeaker, Microphone, Speakerphone, Vibration; Memory Internal: 8GB, 1GB RA ...
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