I just ordered a 755P off of ebay. I turn the phone on and it won't connect to the the home network. It says "network search" and never finds a network and ends up saying no service. When I switch it to allow roaming, I get full bars. I know I'm within the sprint network, my palm centro is right next to me and it has max signal bars.

Has anyone had this problem, what did you do to fix it, I called sprint customer service and they were no help. I initially wondered if my phone signal was shot, but how come it works when I allow roaming? Could it possibly be the phone is from somewhere else in the US and is on a different "home" network?

Please help.