Hey guys whats up, I finally unlocked my Cingular Treo 750. I got the code from the Cingular rep, then I put my moms T-mobile sim in my phone, once i powered the phone back on, it asked me for a unlock code, I entered the code they gave me, just the code itself once I entered it a box popped up saying sim code passed, and wala now i can use T-Mobile or w/e gsm carrier.