: Release both buttons as soon as the Fastboot Mode screen appears.
VIVO devices (especially those running Funtouch OS) often have a locked Fastboot mode for security reasons. Unlike stock Android devices, you may not be able to use Fastboot commands on a standard VIVO Y21t unless the bootloader is unlocked. How to Open Fastboot Mode on VIVO Y21t
: Open a command prompt or terminal in your ADB folder and type the following command: adb reboot bootloader The device will automatically restart into Fastboot Mode Android Open Source Project How to Exit Fastboot Mode : Release both buttons as soon as the
| Goal | Button Combo | | :--- | :--- | | | Volume Down + Power (Release Power at VIVO logo) | | Recovery Mode | Volume Up + Power | : Open a command prompt or terminal in
Rooting your VIVO Y21t voids the warranty and can expose your device to security risks. Proceed only if you fully understand the implications.
However, you can still enter the mode. Here is how to do it.
Use this method if your hardware buttons are not working or if you are already connected to a workstation for development. :
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