Roaming or searching for signal

[houseflipper]

My htc touch was working fine had it set up perfect no problems. Then it started losing signal I didnt have a good signal anywhere. Finally took it into the guy at cricket who flashed it. They tell me that it has been exposed to moisture. There is a moister indicator under the back cover. ( A small white patch that turns pink when it gets wet.) Ok fine I am going on a trip soon and need my phone to work so I bought another one. He flashed it it worked great he set it up so it would work on roam everything was fine. Then after coming home I transferred my contacts shut the phone off and left it charging over night. The next day it either is searching for signal or when it finds a signal it is in roam. I have searched the forums reading for the last 3 days and cant really find what I need to do. Also the new phone has os 5.2 1620 my old one had 6.1 I am computer literate but this is all fairly new to me. I actually have more questions after reading than I did before. Can someone help me or point me in the right direction. I have to have the phone working as I am leaving on my trip tomorrow.
I am on Cricket service in Kansas City Mo.
OS 5.2.1620 says windows mobile 6 pro
Rom Version-1.12.651.1
Rom Date-09/18/07
Radio Version-2.13.00
Prl Version -05044
Pri Version-1.33_003