Flash firmware on OukItel C15 Pro plus
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How to flash OukItel C15 Pro plus ?
Why reinstall the firmware?
Errors constantly 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 is slow.
You are not satisfied with the functionality of the stock (official) firmware.
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. It must have enough memory to fit the firmware.
Determine your smartphone model.
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 via the Play Market. 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, 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.
Press the 'FLASH TO RECOVERY' button and confirm your choice.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered 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 clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. This will delete all user data from the device, but avoid a wide range of software errors and other problems.
Now you can 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 location where the files were copied.
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 writing files to the device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: OS: Android 9.0 Pie; Processor: MediaTek Helio A22 MT6761 2,00 GHz; Number of cores: 4; GPU: PowerVR GE8300 @660 MHz; RAM memory: 3 GB; DualSIM: Yes; Internal memory: 32 GB; Memory cards: microSD, microSDHC, microSDXC; Main display: IPS TFT 16M colors 600 x 1280 px (6.09") 232 ppi; Touchscreen: Yes; Digital camera: 8 Mpx; Flash: Yes, LED; Secondary camera: 5 Mpx; Video: H.263, H.264, H.265, MPEG4; MP3: Yes; Speakerphone: Yes; Bluetooth: Yes, v5.0; NFC: -; GSM frequencies: 850/900/1800/1900; Standard UMTS: 900/2100; GPS: Yes; GLONASS: -; WiFi: Yes, v802.11 a/b/g/n/ac; GPRS: Yes; USB Yes, v2.0 OTG; WAP: Yes, v2.0; IrDA: -; LTE: Yes; HSCSD: -; HSDPA: Yes, 42.20 Mbit/s; HSPA: Yes; HSPA: Yes; HS ...
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