Iphone 5 rebooted and stopped working?

I bought an iphone 5 from ATT, and I stopped paying the bill, I took out the sim and strted using it as an ipod, but my stupid friend decided to try and jail break it. And when it rebooted, it was back at the activation screen, and when I put the sim inside. It doesn't activate… How can I get in the phone without going to att

You need a active att sim card.
if your looking or a factory unlocked iphone 5, email me
I have a few for sale or trade.

You deleted AT&T and the iPhone no longer has a carrier, you must buy a new cell phone plan to get it back.

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