My iphone 3g lost service and i can't get it back

This morning i lost service and i tried restarting it, taking the sim card out, blowing into the sim card area, turning on airplane mode, everything and nothing will work!

I had this happen to me, if your phone is out of warranty then you have two solutions that might work. One go to a carrier store and ask them for a new sim card, this will either be free or a few bucks. After inserting it if your phone does still not have a signal than its an internal issue. Unfortunately my second solution is that you replace your phone.