hi
new to this forum, so don't know if I am posting in the right place.
I recently transferred my old phone number to my wife and got a new contract for my self (for a number of reasons).
My problem is that after swapping over the sim (which included unlocking of phone) and updating phone number everywhere I could find in the phone, the phone still displays 'this mobile' when my wife is calling.
Check in settings -> device -> advance settings -> sim and you may find there is the old number listed there. if it is hit menu and it should let you change it.