problem setting up my O2 account

[Jon_Wood]

HI, My name is Jon and I have just signed up with O2 after being with 3 Mobile for a number of years. I have not received my new sim card yet but was trying to set up My O2 account but when trying to it says that my mobile number ( I am transferring it from 3 to O2) is already associated with another account.

How can I overcome this?

[pgn]

O2 has made changes that make using MyO2 nigh on impossible @Jon_Wood - affecting many, many customers (a search of the forum will show the scale of the issue).

You may have to wait it out, otherwise contact O2, Guide: How to find help & contact O2 to get urgent queries answered. Good luck.