If you see a message saying No Service on iPhone, you probably can’t make or receive calls, and all you get is that error message. This is an indicator of several potential issues. You could be having a problem with the cell phone carrier’s service plan, a misconfigured setting or hardware issue with the phone.

There isn’t one particular problem that’s causing your iPhone not to have service, but you can troubleshoot the issue by trying the easiest and most likely steps. These include a simple setting change like cellular settings or disabling Airplane/flight mode.

In some common cases, the iPhone may need an update on the cellular settings via a software update from your phone’s service provider, or resetting/replacing the SIM card. Often times, the issue is with the phone carrier’s plan so you may need to call them to fix it. Here’s a troubleshooting guide you can read more http://techevangelistseo.com/no-service-on-iphone-get-the-fix/