unlocked htc 8525 upgrade to wm6

ok, as you know, the 8525 comes with wm5. But I have an unlocked 8525 from cingular, and im using it with t-mobile since its unlocked. But now, i plan on upgrading to wm6 through htc website. If i change the os to 6 from 5, will this lock my phone or will it remain unlocked for me to use with t-mobile?. HELP!, and thanks

well, sorry for double post but if anyone is wondering the answer. if its unlocked and you switch to wm6 it wont relock. So you are safe to upgrade. Many new features and overall better perfomance of the phone

Wm6 Rom????

yes from WM5 to WM6 wont relock

I think it's time for you to eBay the 8525 and step up to the HTC Kaiser/Tilt