How to restore factory settings 

When might the option to restore a phone or tablet to factory settings be useful?

1. Before selling or transferring your device to someone else.

In this way, you can protect yourself from unauthorized access to personal information..

2. In the event of a serious failure.

Keep this option only if all other methods of resolving your technical problem have failed, the device is out of warranty, and you do not want to have it repaired at a service center..

Jak przywrócić telefon z systemem Android:

1. Settings
2. System
3. Reset options
4. Erase all data (factory reset)