Thanks @gmarkj. Seems like this is a real pain, I've now been trying to
resolve it for over a week and still no further forward. Any insight
would be great!
Hi Sharpy_G, Did you manage to get this problem resolved? I have done
exactly the same as you moved from Tesco to O2 so I can use my Apple
Watch on Cellular and after many talks with customer service on line and
phone no further forward. Grateful if ...