Help My phone bill is exploding

[darkfibre50]

I have just upgraded the HD to 6.5 Energy rom with sense 2.5
A lot of times when I put the phone away in my pocket it dials the last number in the call history and connects while I am walking around and I have so many voicemails at home of me walking around talking it scary.

Is there some way I can have a confirm dial screen or some other way I can stop this from happening. Its really annoying when global roaming and hard on the pocket!