In App purchase in iOS suddenly stop working ( Error code=5002 occurred )

Question

I have integrated in-App purchase in my application successfully. I tested it properly by making test user account in itunes. My in-app purchase worked fine. But suddenly my

Answer 1

If you are testing on real device, make sure it is not JB. If you are testing on simulator, make sure you are running iOS 6.0 or above, lower version of simulator doesn't work, I wasted a whole day to figure this out...