PRODUCT ADDVERTISED AS MOTOROLA RIZR Z3 ULOCKED GSM QUADBAND CELL PHONE-BLACK. EVENTHOUGH THE PHONE IS TAGED TO T-MOBIL'S OPERATING SYSTEM AND WILL NOT LET ALL MY ATT NETWORK WORK.CALLED SELLER AND HE ADVISED THAT I CONTACT T-MOBIL FOR HELP/ THEY COULDN'T.