Hello everyone, I was just poking around on my iphone 4, when I noticed the carrier signal went up and down several times. Then my phone couldn't access the internet. Then a message popped up on the screen that said, "Iphone can no longer make or receive calls, you must restore." I restored to my last sync, didn't help anything with the calls. I can't make any calls now. I don't want to loose my jail break... What should I do now...?