Simply press and hold the continuously for 10 to 12 seconds . This forces the hardware to cut power temporarily and perform a hard reboot. The phone will cycle back into the standard ColorOS home screen. Option B: Using PC Commands
To perform any of these advanced tasks, you access Fastboot Mode (also known as Bootloader Mode). Unfortunately, the Oppo A37—like many MediaTek-powered Oppo devices—does not have a standard, straightforward Fastboot Mode. how to open fastboot mode on oppo a37 verified
Press and hold the Power button down for roughly 10 to 15 seconds. The device will hard-reset and boot into the standard ColorOS home screen. Simply press and hold the continuously for 10 to 12 seconds
When the Oppo A37 is in fastboot mode, it might display a small text indicator saying "Fastboot" on a black screen, or it might appear completely unresponsive. To confirm a successful connection: Keep your phone connected to the PC via USB. Open the Command Prompt inside your platform-tools folder. Type: fastboot devices Option B: Using PC Commands To perform any
Your phone will automatically turn off and restart in Fastboot mode. How to Exit Fastboot Mode on OPPO A37
If you are stuck in Fastboot and cannot exit, hold the Power button for 15+ seconds until the screen goes black and the phone reboots. This is a "hard reset" of the session and is often the only way out if the software is unresponsive.