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I am asking this question for a friend and don't have the exact readout from his iPhone 5c, but it sounds like it is telling him to reenter his puk password/phrase. I think this has to do with the sim card. Any one have any ideas?
Yes, it's sim card issue, the PUK Code can be found from the box that came with the Sim Card. If he doesn't have it anymore, he probably needs to contact his carrier; they should have it on thier system