I know i am a few models behind...
I had the iphone 3...worked great in the shop...i use it as my business phone...
last month, upgraded to iphone 4....well doesnt work so well in the shop..
I have to walk outside and cross the street so the person can hear me..I can hear them just fine....its wonderful taking an order outside when i am wearing a shortsleeve shirt in 0 degree weather...
iphone 4 sucks