Once your OPPO Reno2 5G reboots, the screen will go black with small, colored text. You will see something like:
for a few seconds until the power menu appears, then slide to turn the device completely off. Button Combination : Press and hold the simultaneously for several seconds. Enter Fastboot : Release both buttons as soon as the Fastboot Mode screen appears on your display. Alternative: Using ADB Commands How to Open Fastboot Mode on OPPO Reno2 5G
If the above command sends you to Recovery Mode (with options like "Wipe data" and "Install update"), do this: Once your OPPO Reno2 5G reboots, the screen