hi, had a wifi issue with my iPhone 4s, Apple has replaced the phone as faulty, now the replacement phone keeps saying unable to download songs, and when on iTunes it wont sync at all, no matter what i check or uncheck i cant find a solution, ive deleted then re downloaded them etc but no success, really had enough of of Apple at the moment all worked fine on the old phone and to top it all the new phone has a chip on the rear glass and thats going back soon, im running ios6 and the latest iTunes , please help as its driving me mental !