Can’t make calls on new phone

[Stellsastar]

There is no network connection on my new phone and I’m unable to make calls

[jonsie]

Do you still have your old sim?

You probably need to do a sim swap

Guide: Sim Swap: a mini guide 2017 update 

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. If you message O2 using the links below, they should be able to help you with this
or give them a call on 202  or 0344 809 0202

Guide: How to find help & contact O2 

[MI5]

@Stellsastar 

Use your old sim if it fits