Good Morning,
Occasionally a new account can take a couple of hours to 24hours + to fully activate, so keep turning the phone off and on to help reboot the services.
Remove the sim and wipe it down first.
I assume the handset your using is fully unlocked to all networks or locked to 02 so would accept the 02 sim. If your using a sim adapter these can cause issues by not seating properly in the sim tray.
If no joy then please contact 02 Customer Services to ensure your account is ok.
The numbers are :
Contract Customers.
From your O2 mobile 202 Free
From a landline 0844 809 0202 5p / min
From abroad +44 844 809 0200 Free
PAYG Customers.
From your O2 mobile 4445 25p per call
From a landline 0844 809 0222 5p / min
From abroad +44 7860 980 202 International rates
Business Customer Service Number
From your O2 mobile 8002 Free
From a landline 0800 977 7337 Free
From abroad +44 844 809 0200 Free
Monday-Friday 08:00 - 21:00
Saturday 09:00 - 18:00
Sunday 09:00 - 18:00
Live Chat Services are fine for Low Level General Enquiries, not connected to Account Enquiries.
Occasionally a sim can be faulty and can be replaced by visiting an 02 High-Street Store to ask for a blank sim, and ask the employee to carry out the swap my sim procedure which moves your tariff and number over to the new sim card. Same applies as above about this taking a few hours to fully activate.
Hope all goes well.
Take care.
