Phone reset

A Phone Reset,Factory Reset or Hard Reset is a way to delete all data and apps in the device. It can be used to remove screen lock password, remove all app and data.

To do this: It can be factory reset by going to: Android Settings > Search > Factory Reset > Erase All > Ok or by going to recovery mode by pressing and holding "Power + Vol Down" (for Oppo) "Power + Vol Up + Home Button" (for Samsung) "Power + Vol Up" (for Huawei) For others refer to their manufacturers page to enter recovery mode. If you see "No Command" in the screen press and hold "Power + Vol Up" or wait a few seconds. When the recovery menu appears release the buttons then use volume buttons to go to Factory Reset then Press Yes

If you still cannot here are the videos:

Here a former videos and other of resetting phones and unboxing phones.