​@Ella11123  Welcome question did you test you area where your not received signal before coming over to ID Mobile?

Please check IDMobile network checker cover and status here  https://www.idmobile.co.uk/help-and-advice/coverage enter full post code.

Sometime the porting may be completed the following day regardless of your message stating it been done. There's a number of reasons why this may be happening to you. 

Turn your phone off for about 5 minutes and turn back on and manually scan for networks on your device and pick IDMobile to see if this make a difference. 

Joe 🙂