Charlie Miller has once again won the Pwn2Own contest by successfully hacking iPhone 4 using an exploit found in Mobile Safari to swipe the address book of the compromised iPhone.

This year’s Pwn2Own contest will play host to a new world of mobile phone hacking when security researcher Ralf-Philip Weinmann shares a new way of hacking a cellular device, writes ReadWriteWeb’s Sarah Perez.

You think your iPhone was a state prison in terms of security? iPhone’s SMS database including inbox, sent messages and even deleted messages including the photos were hacked under a mere 20 seconds. The hackers even claim that they can do the same thing with your contacts and other personal information.