[shaggylive]

it's possible you got the buggy version, but it sounds like your phone is set to evdo only.
settings>personal>phone, Services tab
check the following
roaming options = Automatic
Mode of Operation = hybrid (calls and sms use 1x, evdo only will prevent incoming but not out)
DDTM Mode = off (Data Dedicated Transmission Mode)

if you don't have those options, search for the reg to enable the options, and make sure they aren't set different.

btw, are you getting incomming calls???