It will remove all the data ,contacts and apps that you installed
1.Press and hold volume Down power button.
2.When android logo appear
3.Select Recovery Mode
4.use vol down key for scroll (don't press vol up key)
5.go to wipe/reset and press vol up key to select
now reset done
Videocon A15+ Restore Factory Hard Reset Format Phone.So lets start the Videocon A15+ Restore Factory, Videocon A15+ Hard Reset.Turn Off the mobile phone for few mints.Videocon A15+ Remove Pattern Lock.
Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.