Cellphones are chock-full of features like built-in cameras, personalized ring tones and text messaging. They also gave a real boost to Kenny Hall's effort to cheat on his girlfriend. Cellphone-based alibi clubs, which have sprung up in the United States, Europe and Asia, allow people to send out mass text messages to thousands of potential collaborators asking for help. When a willing helper responds, the sender and the helper devise a lie, and the helper then calls the victim with the excuse. Another new tactic is the use of audio recordings that can be played in the background during a phone conversation to falsify the caller's whereabouts. | 
