I don't use the End key very often. Instead I hang up by re-inserting my 9930 into the OEM holster (with an on/off magnet embedded). Go to Options, then Call Management, In Call Settings, Auto End Calls: Into Holster.
If you hold the BB button, you can get home, but no hangup option. I'm surprised there's no hangup option either on the touchscreen or the menu if you tap the bb key. How do you turn the phone off?
I agree with the other members. Since I make 90% calls to overseas a quick hangup would save me money. The touch screen end button is too inaccurate and unreliable.