How to clear all the information on the mobile phone?

Just restore the phone to the factory settings. Take OPPO R9S mobile phone as an example. The specific method is as follows:

First, find the "Settings" item on the mobile phone desktop, and click Enter.

Second, after entering, find the "Other Settings" item and click Enter.

3. After entering, find the column of "Recovering Mobile Phone" and click Enter.

4. After entering, click "Clear all contents and settings", so that the phone can be restored to the factory settings and the information on the phone will be cleared.