Temperature Warning on iPhone?

I've had my iPhone 4 for about a year now and it's performance has been fine but lately (past few months) every time I plug it in to charge, after a few minutes a temperature warning comes up, that says wait til the iPhone cools down.
I generally only get about three minutes before it cuts to the warning while charging. The phone always feels cool (room temp) but the Warning locks the entire phone, so all I an do is wait for it to charge or turn it off and back on, but even then I only get the few minutes again.
Even when I plug it out I have to wait for a while before the warning goes away.
This makes syncing it with itunes impossible also. It's really annoying!

Sounds like a firmware problem…

This is a fairly common problem on a lot of Iphones. Take it to your Apple store, and have them run a diagnostic on it. Many have been replaced due to this strange anomoly… (Or take it to an AT&T store if you are with AT&T.)

This happeneded to my iPod. It gets to hot under heat warning. Unplug it let it cool down or try and get it replaced

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