Flash firmware on myPhone Professional Bs21
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How to flash myPhone Professional Bs21?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some installed applications do not open.
Some programs from the Play Market do not start.
The phone restarts or shuts down randomly.
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 specialized resources where users post custom or official OS.
What should be done before installing the firmware?
Create a backup copy of user data, contacts and photos 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 phone battery.
Find and download the archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone.
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. Select the file downloaded in the previous step.
Press the 'FLASH TO RECOVERY' button and confirm your choice.
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 your 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 appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the location where you copied the files..
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 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.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: OS: Android 8.1 Oreo; CPU frequency: 1500.0 MHz (4-core); Chipset: MediaTek MTK6739; GPU: IMG 8XE 1PPC; GPU frequency: 570.0 MHz; RAM Memory: 2 GB; Display: TFT Color (16M), 720x1280 px (5.0") 294ppi; Touch screen: yes; Protection: Gorilla Glass 3; Built-in memory: 16 GB; Memory card: MicroSD/TransFlash max. 128 GB; Camera: 8.0 MPx; Matrix model: GC8024; Flash: LED; Autofocus: yes; Diaphragm: f/2.4; Optical zoom: no; Digital zoom: no; Second camera: 2.0 Mpx; Bluetooth: 4.2; EDGE: no; GPRS: yes; GPS: yes; A-GPS: yes; Glonass: yes; LTE: LTE-FDD: 800, 900, 1800, 1900, 2000, 2100, 2300, 2600; GSM: 850 900 1800 1900; HSDPA: 850 900 1900 2100; USB: 2.0; WAP: 2.0; Wi-Fi: 802.11 a/b/g/n; Audio out: ...
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