BT phones come sim free all the time. i have bought a T610 from the carphone and my mate bought a e700 from the link and they both came sim free on BT. I DONT THINK BT BOTHER

BUT if you wish to buy from orange or vodafone- the main culprits

tend to lock the phones to they own respective networks. for example orange tend to change the menu. when i bought my Panasonic X70 from them they had changed the original menu and had their own

although it is better than the menu on my sim-free d500- which i bought online from
www.e2save.com on the vodafone network. suprised it wasnt locked

. on new phones that you get from orange they also have a orange menu on the home screen which you cant remove

the popular phones that have that is the grey d500, SE k700 and samsung e800.

check the difference out lads.