Jailbreaking is now legal, and what perfect timing. Users of the latest apple unit Iphone 4 running on iOS4 can now jailbreak their devices! To jailbreak means to allow your phone to install and run apps from places other than iTunes.
the iPhone Dev-Team has released the carrier unlocking tool called Ultrasn0w for US based iPhone 4 users who are stuck with AT&T network. For those of you who don’t know, carrier unlock for US iPhone 4s required complete rewrite of ultrasn0w software because of the new baseband OS present in iPhone 4.