It will remove all the data ,contacts and apps that you installed

How To Hard Reset:
Remember! Your All Data Will Be Lost! Save Your Important Before Making Hard Reset.
1.Turn Off Your Phone
2.Push Power Key And After Phone Vibrates Once Press Volume Down Until You Will See Exclamation Sign On The Screen
3.Push The Buttons In This Order: Volume Up
Volume Down
Power
Volume Down
4.Wait Until Format Ends And The Phone Restarts
Done :)
Nokia Lumia 720 Restore Factory Hard Reset Format Phone.So lets start the Nokia Lumia 720 Restore Factory, Nokia Lumia 720 Hard Reset.Turn Off the mobile phone for few mints.Nokia Lumia 720 Remove Pattern Lock.
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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.
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