Hi, After upgrading to IOS 7 (now 7.0.3) I get random "SIM Failure" on my phone (4s). What I have noticed is that it usually happens when I am using navigation. The only way to recover is to do a 2 button reset multiple times (sometimes I need to reset as many as 5 times to get it working again). I have done: 1. Got a new SIM 2. Reset network settings 3. Restore the phone using iTunes However nothing fixed the issue. I am contacting apple about this problem because before IOS 7 I never had this issues. Please let me know if anyone is experiencing the same. Thanks.