noob with noobish question

[chris_cup]

i replaced my $h!ty sony ericson phone and my belter itouch for an iphone yesterday, and i think it's funkin' aces.........but..........when dailing it wont let me hang up which ofcorse led to several 2 min answerphone messages, not good.

helps please

 

[Justin]

Red button? Bottom of the screen?

 

[Fletcher]

Big red button at the bottom of the screen, with end call written on it??? :S