Hi, so I have this unlocked old Samsung Captivate (100% it's unlocked because it went from Rogers to Bell to Telus during its lifetime) and since last Saturday I don't get to access the Koodo network anymore (I always payed my bills). Although I'm receiving a signal (-83dBm/15asu on UMTS:3 network) I don't have access to any services from Koodo even though I did 2 days ago! Is it the sim card that's acting up or am I forced to buy a new cell/sim & forced to switch providers? ANy help would be appreciated! Thanks!