Lately I've noticed that I cannot use the button under the trackwheel to end my calls manually on my 7290 and it's resulting in be charged like 5 or 6 extra minutes each call until it finally disconnects itself. However the button does work to exit from other features like to go back to the main menu from the calander or the phonebook. It simply won't respond when a call is dialed or received.

I haven't changed anything options wise, can anyone help??

Hey I had the same problem on my 7100g with the actual 'end call' key. Not sure why it happened but I just yanked the battery and it stopped doing it.

Hope that helps.