So when you hard reset your phone, it will result in loss of data including your contacts in phone memory and whatever you have stored in phone memory. To avoid loss of any important data, your can back up your data onto your memory card. There is an option provided in the phone to backup all the phone memory to memory card. To know how to backup your data, watch this video: http://www.youtube.com/watch?v=yPpqwhU4ErM
To hard reset your phone, Follow these instructions:
