Quote:
Originally Posted by jawi  z3x box not support this model u have to do this as he said.but aftter change to gsm u can not use in north america 
1. Press start
2. Look for SERVICE MODE , if you don't find it at first page then press All Programs as well as More till you locate SERVICE MODE
3. Select SERVICE MODE
4. Change from CDMA to INT'L GSM |
i did what he said but my phone is lock after i did what he said my phone saying invalid sim if ur phone is not lock then u can do that way he said