Flash firmware on Coolpad Y72-921
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How to flash Coolpad Y72-921?
Why reinstall the firmware?
Errors constantly appear in the Android OS.
Some applications stop opening.
Some programs from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone began to work slowly.
You are not satisfied with the possibilities of the stock firmware.
Where can I find the firmware?
On the official website of the manufacturer.
On sites where third-party developers and phone manufacturers 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 your SD card into your phone. It must have enough memory to fit the firmware.
Determine your smartphone model.
Fully charge your device's battery.
Find and download the archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Download and install the Official TWRP App from the Play Market.
When you start the application for the first time, you must agree to install a new firmware and all the risks associated with this, 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 'Select Device', and select your phone model.
After selecting the phone, the application will redirect the user to a web page to download the modified recovery environment image file. 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. Then we tell the program the path where the file loaded in the previous step is located.
Press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.
Copy the firmware and other necessary files to the SD card.
Insert a memory card into your phone.
To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. Select 'Reboot' and then click on the 'REBOOT RECOVERY' button.
Firmware via TWRP
Before flashing, it is recommended to clear the 'Cache' and 'Data' sections. This will delete all user data from the device, but avoid a wide range of software errors and other problems. You must press 'WIPE' on the main screen.
You can start flashing. Click the 'Install' button.
The file selection screen is displayed. At the very top is the 'Storage' button, select the location where the firmware file is located.
Select the location where the files were copied. Press the OK button.
Find the file we need 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 writing files to the phone's memory will begin, accompanied by logging and filling in the progress bar.
After the firmware installation procedure is completed, the 'Successful' message appears on the screen.
Summary: OS: Android 5.1 Lollipop; CPU frequency: 1200.0 MHz (4-core); Chipset: Qualcomm Snapdragon 410 MSM8916; GPU: Qualcomm Adreno 306; RAM Memory: 2 GB; Display: LCD IPS Color (16M), 720x1280 px (5.0") 294ppi; Touch screen: yes; Built-in memory: 16 GB; Memory card: MicroSD/TransFlash; Camera: 7.99 MPx; Resolution: 3264x2448 px; Flash: LED; Autofocus: no; Optical zoom: yes; Digital zoom: yes; Second camera: 5.04 Mpx; Resolution: 2592x1944 px; Bluetooth: 4.0; EDGE: yes; GPRS: yes; GPS: yes; A-GPS: yes; Glonass: yes; LTE: LTE-FDD: 1800, 2100, 2600; GSM: 900 1800 1900; HSDPA: 850 900 1900 2100 HSPA; HSUPA speed: 5,76 Mb/s; HSDPA speed: 21 Mb/s; USB: 2.0; WAP: 2.0; Wi-Fi: 802.11 b/g/n; Audio formats: ...
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