Preparation tool: OPPO R9.
System version: Android 7.0.
Step 1: Click "OPPO Member" on the mobile phone desktop, as shown in the figure.
Step 2, select the "login encountered problems" option, as shown.
Step 3: Click "Retrieve Password", as shown in the figure.
Step 4, enter the OPPO mobile phone account, as shown in the figure.
Step 5, use your mobile phone to get the verification code and enter it, as shown in the figure.
Step 6: After the verification code is verified, you can reset the password of the OPPO account, as shown in the figure.