Dear friends

anybody can help me...i bought 2 xv6600 by verizon and i try to set the nam program using ##778 but it's still can not reach the signal. i think verizon already lock the phone only can use by verizon.i think verizon lock the PRL. ANYBODY CAN HELP ME ??? PLEASE/////// i dont know what i had to do???????

usually i use audiovox thera 2032 and samsung I700 and it can work at here....but xv6600 why so difficult to reach the signal