Factory data reset is a process that erases the data on your device and restores it to the state it was in when it was first purchased. This will delete everything you have installed so far; Apps, games, photos, work and video files, etc. Also, all accounts, settings, apps and related caches in the internal memory will be deleted.

SIM free mobile phones are easy to restore because they are not blocked by network operators. However, to reset your smartphone, you must first plug your phone into a power source. Mobile experts recommend charging the battery to at least 50% when doing a factory reset. And don’t forget to back up everything from your phone and transfer it to a safe place or device before doing the reset, because everything will be gone after the reset.

How can you factory restore Android phone?

To factory reset your Android phone or pay while using your phone, first back up your phone data and remove your microSD card and SIM card if you have one. Then go to the settings option, select the security option to lock the screen and set it to None.
The next step is to delete your Google account. To do this, you must first sign out of your Google account.
And any other accounts you’ve used before and the devices you’ve signed in with.

Then tap the delete account button for each account that has been used, one by one. It is better to delete all the accounts that are currently in use at the same time. You can do this simply by logging into your Google Account and selecting each account to delete by tapping the Delete Account button.
Everything went well. Now you need to clear the data from the phone. Don’t forget that there are differences in how phones are manufactured, so we’ll move on to the most common methods for resetting phones. To do this, simply go to Settings, select system options and proceed to advanced options.
There you need to select backup and reset options. Then select the factory reset option to reset your phone. Finally, when the system asks for confirmation to delete all files, you just need to tap the button to delete all files. And this is how your phone will be reset to factory settings.