Originally Posted by scotty85
check out the top left hand side... if it lacks a sim card tray that will tell you without a doubt it wont work
no way any gsm phone will work without a sim card
for the price id grab it. you can always resell or possibley trade it for a gsm variety
All versions of the One have Sim card slot on the left hand side. Theoretically if you get the Sprint version sim unlocked by Sprint, you could get it on AT&T or T-Mobile's slower data but why live with a handicapped phone? You would not be able to use LTE or HSPA+.