Iphone 3G bought from ATT in LA, trying to use with Rogers Wireless in BC, Canada.

First tried to install yellowsn0w 0.91 via Cydia. Tried various methods such as waiting over 1 minute, inserting-reinserting sim, reinstalling yellowsn0w, reboot with bosspref etc., still could not get any signal from Rogers.

Then I did a clean restore then jailbreaked with quickpawn to 2.2. Then installed yellowsn0w via installer, combined with mobileterminal and sbsettings. Finally got five full bars of signals, but all signals dropped after attempting outgoing call. After many trial and errors, the current situations is, edge works, 3G works, Wifi works, SMS and incoming call all works, but no outgoing call. Only way to get signal back after attempting a outgoing call is regular reboot. After reboot, did not need to do the yellowsn0w -c etc in mterminal. Just used airplane on/off directly and I could get the signal back. But still no outgoing calls.

Seems to be the exact situation as a lot of tmobile users.