iPhone app does not run on old device (3G, 3GS, …) [duplicate]

Answer 1

This can come for various reasons. Until now this is are the cases pople have encountered:

• bad cable -> try another one, or hold it really still when programming
• unsuported features mentioned in info.plist -> check plist
• unsuported architecture (by default Xcode4.2 uses standard arch= armv7 ) -> add armv6

Answer 2

Check your cable or your device dock. The problem in your console says your material connection is not healthy. Can you perform an itunes synchronization ?

Answer 3

Check the frameworks used by you... mostlt it happen that a some of frameworks doesn't work for old devices so they should not be of REQUIRED type but of OPTIONAL. Hope it works for you.