I am using VZAM and the Pantech UML290 on a Mac Mini. I notice that connecting after first powering up the computer in the morning results in an unreliable connection with the computer finally loosing communication with the modem. Using "detect device" does not work. Restarting the computer and reconnecting solves the problem. It took me a while to figure this out by trial and error only after repeatedly unplugging the modem and reinstalling the SIM card. Has anyone else noticed this behavior, or is it my compuer? Paul