Till now I also thought that this is expected behavior and was using the same Autoconnect/Autodisconnect combo as you. But after reading nicolai's answer I just checked with the User Guide and it looks to me now that phone is not connecting to Internet only when needed, but it scans for available network and connects to it every time the interval you have set in Autoconnect had passed. Because modest e-mail on my device is set to check new mail every 1 hour and autoconnect is set to 1 hour I always though it is the e-mail that requires connection. Now I changed Autoconnect to "Never" and will have to wait to see if N900 establishes connection when some application requests it. I am interested how other users have set up their devices and what are the results. Sorry for the long offtopic - may be shall start another topic?