Originally Posted by aiharkness
There were times in the past when 3G signal would become weak that the device would not successfully drop to EDGE. A soft reset (alt-cap-del) would fix it for me. I don't know if that is still the case with the newer versions of OS 5 or not. Anyway, something along those lines is the only thing that comes to mind. Not exactly the same thing, I know. But, if it's a problem, you know the first troubleshooting step.... Do a battery pull.
EDIT: You are talking about the 9800, aren't you? Same advice still applies. Try a battery pull.
Also, update your profile.
ahh forgot that alt cap del thing, will do and see if it works.