Good Morning All

i just brought myself off Trademe a iphone 2g running 3.01 unlocked and jailbroken
i have did a search around and see that the 2g can work on the Telecom Xt Network i have ran the iphone carrier bundle and when i go to the setting and about the Carrier as Telecom NZ 5.0

when i put in my XT simcard (its on a plan) i get  no service

how do i get it to work, all i know that i was told that you can get the network but it be running on the Slow side... but i not to worried about that


please help or put me into the wrong direction
thanks