i'm shocked to hear people have signal issues!
I used mine last week in the car in my pocket fine. Only to hear that the friend in the car behind could hear it when she was close (At traffic lights etc) - so i got a good 10 feet if not more from mine!

Have tested it on 4 radios, and i can see a slight difference with some though. One of the House radio's needs the N900 within 4 foot for it to work!