If you’re thinking of opening an account with 02 don’t! O2 fraudulently charged me for 2 years for 2 lines I didn’t know about or have a contract for (my charges are irregular as I travel abroad a lot). They stole over £900 and admitted it but after 2 months still have not refunded - I get passed between Pakistani/Philipine and South African call centres who can’t resolve anything and just say wait 5 more days! Unbelievable a big company robbing their customers with no way to call a UK office and resolve.