No service

[Alisonpk]

I added a third handset to my account for my daughter to use. She wanted to keep her previous number so that was all arranged. Was due to change today but it hasn't. The old number has moved to the handset as when I call it goes straight to o2 voicemail but she can't use it, it's saying no service and trying to actually speak with someone at o2 is virtually impossible. Is there something she maybe needs to do that hasn't? Thanks

[MI5]

@Alisonpk 

Try rebooting her phone, if not, you'll need to keep trying O2. 

Guide: How to find help & contact O2 

Guide: Migration & porting into O2