I upgraded yesterday morning have kept the same number. I was told it could take up to 24hrs for service to start on my new SIM. My phone is showing O2 service and I am able to send texts but unable to call out or receive incoming calls
It can take up to 6pm for the port to complete (although it is normally complete before this).
There is some advice in the guide below about porting in to o2.
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
Track usage, upgrade and get support with the My O2 appDownload My O2