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.
It is a browser based jailbreak, all you have to do is to browse to http://jailbreakme.com from your iOS device to jailbreak it. Servers are probably thrashed right now. Keep trying until you successfully load the page. This guide will show you how to jailbreak your iPhone 4. In case you actually need a guide.
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.
Since Apple is selling unlocked iPhone 4s internationally, it is only the United States users who are still locked on AT&T network. So if you want to use your new iPhone 4 on networks other than AT&T, like T-Mobile for example, you can use this newly released Ultrasn0w 1.0 software to unlock your phone.