Did you get a new sim card from o2 when you moved over from Virgin @Helli ?
First point of call would be that. Visit your local o2 store with photo ID and they can provide a new sim and get it set up for you.
Second would be swapping handsets - so your sim in his phone, etc.
Next is checking all APNs are set correctly.
Finally checking with Apple no issues with the phone.
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 Do not publish personal details (email, phone number, bank account).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
