@samjammer71 Hello when you say switch I take it you meant port to bring a phone number to a new network? If so part of the porting sometime limited service are I use, be it calls, text etc.
When was your port scheduled for?
If the date has passed turn your phone off for about 2 minutes and back on again this sometimes refreshes the network settings.
Also just have a read of this information below which I found on here.
Port Number Information
Porting Process
UK mobile number transfers do not happen immediately. The switch can occur sometime between 8am - 10pm on the scheduled date. There might be several hours between the old provider's SIM not working and the kept number working with the new SIM.
Cancelling a Port Request
If you have requested to move your number from a different network to iD Mobile, you can contact iD Mobile to cancel the request if it's not too late. However, if you are porting out of iD Mobile, you need to contact the new network for assistance.
Joe
Android OS 16 - Nothing Phone 2, (Samsung Galaxy S 25 Ultra Here to help, I do have a life. 😉