How to reinstall the system \ how to update android system

1, first open the phone, find settings on the desktop, and click to enter the settings interface.

2, and then settings interface to find about the phone, and click on about the phone to enter the corresponding interface.

3. Next, find System Update at the top of the About Phone screen and click System Update.

4. Once inside, find Detect Updates on the System Updates screen and click Detect Updates

5. If you don't have an internet connection, click Setup Networks, and if you already have an internet connection, then you can directly update it, and then you can get the update on your internet connection and download it.