I just got this on contract with 3 mobile, so it is currently locked to the '3' network, however I can open the box and unlock the phone via jailbreaking and ultrasn0w should you wish.
It is still sealed in its box presently.
The reason for selling is that, to be perfectly honest I am not bothered about paying for the pleasure of unsealing the phone and am looking to sell this one and purchase a used one, so if you have a used one you'd trade I'd be up for that too!
Thanks for looking.
RMSD, BT preferred.