Factory format, Factory reset, Hard reset and full factory reset all are same thing and they are used to erase all the data on your mobile and make it as a newly bought device.
Why Reset a Phone?
Older devices get bogged down over time and it can accumulate all sorts of junk in a very short time, either from apps, downloads, firmware updates or any number of other sources. So its better to reset your device when your device becomes slow or you have some other reasons.
Must before a Reset
Three most important steps before a reset are BACKUP, BACKUP and BACKUP.
All your data from your music to photos and from contacts to applications will be deleted so make sure that you make a backup of all the important data.
Steps to reset your Samsung mobile
There are basically 3 ways to reset your device which are given below:-
It is most easy and secure way to reset a Samsung mobile
Step 1 : Open Applications and select Settings
Step 2 : Select “Privacy” or “Backup and Reset” (whatever option is there in your mobile)
Step 3 : Choose “Factory Data Reset” then “Reset Phone” and “Erase Everything”
Its the secret code method and may not work on some versions on Android
Step 1 : Open the dial pad of your mobile (where you make phone calls)