Hi. I have recently updated an iphone 7 to the latest IOS (12.1.2) and now it shows "no service". I cannot seem to find an earlier IOS i can reload on it. Do you think if i wait for a later IOS, that will work. Or is my phone a brick now?. It is out of warranty as well. What comes up on the phone no is an exclamation mark and it say's "unable to activate phone", an update is required to activate your phone. This is what came up when i tried to reset it. Let me know if anyone has any ideas of what i can try. Many thanks, Gary.