hello guys. need a serious help here. i have brought an iphone 4s 16gb locked to att but with no contract with att. and i am in India right now and want to get my iphone unlocked. i have already unlocked my previous iphone 4 via att. but this time the att executive says that my iphone 4s is not eligible for an unlock and if i need to get it unlocked i need to provide an proof of purchase which i dont have. so i am wondering that how they unlocked my iphone previously (lucky me) and why they are not unlocking my iphone now? Is there any other way round to request them and get my iphone unlocked? or any other way? i would really appreciate some good help here.