Flash firmware on Vivo Y81i
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How to flash Vivo Y81i?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some applications stop opening.
Some applications from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone slows down a lot during operation.
You have decided to try a different version of Android.
Where can I find the firmware?
On the official website of the manufacturer.
On certain sites where developers 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 an SD card into the gadget. It must have enough memory for the firmware.
Find out the exact model of your smartphone.
Fully charge your device's battery.
Find and download the archive with Firmware. And place it on the SD card.
Installing TWRP Recovery
Download and install the Official TWRP App from the Play Market.
At the first start, you need to give consent to future manipulations, as well as consent to granting the Superuser rights to the application. Check the checkboxes and press 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 on the 'Select Device' drop-down list, 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, return 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'.
The recording process is very fast, and upon completion, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.
Transfer the necessary files to the SD card. Using a PC or laptop card reader.
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, 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.
Press the 'Install' button to start the flashing.
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 you copied the files. 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 completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Smart Phone OS: Android 8.1 (Oreo); Chipset: Mediatek MT6761 Helio A22 (12 nm); CPU: Quad-core 2.0 GHz Cortex-A53; GPU: PowerVR GE8320; Type: IPS LCD capacitive touchscreen, 16M colors; Screen Size: 6.22 inches, 96.6 cm2 (~83.0% screen-to-body ratio); Resolution: 720 x 1520 pixels, 19: 9 ratio (~270 ppi density); Multitouch: Yes; Protection: Corning Gorilla Glass (unspecified version); : - Funtouch OS 4.0; Card slot: microSD, up to 256 GB; Internal: 16 GB, 2 GB RAM; Alert types: Vibration; MP3, WAV ringtones; Loudspeaker: Yes; 3.5mm jack: Yes; : - Active noise cancellation with dedicated mic; WLAN: Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot; Bluetooth: 5.0, A2DP, LE; GPS: ...
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