How to factory reset a phone Android or a tablet
In this tutorial you will learn how to factory reset a phone Android or a tablet. The simplest solution.
When a device Android refuses to boot, you need to perform factory reset from “Recovery Mode” – “Recovery Mode". We will have to use a combination of buttons to enter the recovery mode. Here are the buttons for some devices Android which you can have:
Samsung Galaxy: Power + Volume Up
Google Pixel: Power + Volume Down
OnePlus: Power + Volume Down
Motorola: Power + Volume Down

Use the volume buttons again to highlight “Factory Data Reset” (“Factory data reset”) and press the power button to confirm.

Prothe factory reset process will start and you will end up with a phone Android in the same condition it was when you first bought it. If factory reset and nothing else worked, it's unfortunately time to retire your phone and get a new device Android. Smartphones don't last forever and it can actually be unsafe to use a phone Android old.