I had a Tesco Mobile SIM and the phone number in iTunes and the address book on the phone would show up as 0787* *** ***

However I'm moving to T-Mobile, and in iTunes and the address book the phone number shows up as +44 787* *** ***

Why the +44 in front? Anyway to remedy this at all? Thanks everyone in advance. I'm not sure if this issue is related to the SIM itself or if the way the phone reads it? My Tesco Mobile SIM was using the official O2 carrier bundle (since Tesco piggybacks of O2's network), however the T-Mobile SIM is using the unknown carrier bundle file since I cannot figure out how to create a real symlink as in 1.1.2.

I wonder if this is the reason for the way the phone number is being displayed? Ideas please.