Normal reset when accessing the phone can be performed by going to settings and selecting the restore and reset item. If your phone is locked, then you can do a hard reset for this, when you turn on the phone, hold down the volume up key, on some models also the "home" button, after that a menu will appear on a black background, you need to find "factory reset" in it, select it and start the formatting process.
What does it mean to format Android, if it means resetting all settings, cleaning the android to a new state. You can format it in different ways, it all depends on what reason forces you to format Android, and then a method is selected, for example, changing the user, the phone is blocked and does not start, the system crashes, etc. You can format the smartphone through the settings, make a regular reset to the factory settings, through reset, the engineering menu, the USSD command, and finally just reflash the device, which of course will be more difficult, but the effect will be the same :). Everything is here: https://www.vamvpomosh.ru/kak_otformatirovat_android.php
The term "format" does not apply to Android - it can be done with a storage device: hard disk, flash drive, etc.
In this case, perhaps, we mean a factory reset. This will erase user data. There are three options for performing this operation.
For more tips for mobile users, read here .
You can just do a factory reset. To do this, go to settings - recovery and reset - reset. Confirm your intentions and read the consequences.
How to upgrade from 4 android to 5? In general, I now have version 4.4.2, tried to update through the phone settings themselves, wrote that the latest version was installed. Please help me update android version.