so i had a iphone 4 before but i got a new one from apple because mine wasnt working properly and proably due to the fact that i dropped it in a cup ok soda. But how should i setup up my new iphone..i backed up everything on my sisters computer so do you think i should set it up from the backup or start new. Will i experience any problems if i back it up from the old iphone? Is their any other way to get contacts