In Ireland these phones seem to lock on to the network that you put the first sim card is into them.
I've never seen this before, bought the phone in a meteor store which wasn't my network, they guy asked me do I wont a sim card as it is locked to meteor
I declined, thought I was going to have get unlocked anyway but when I got home tried my sim and it worked. Thought I was lucky and got a sim free phone so tried
a sim from meteor and guess what it asked for a sim unlock code.