Apple has recently added a post about iPhone SDK 3.1 beta 2 and iPhone OS 3.1 beta 2 to the iPhone Dev Center.
iPhone SDK 3.1 beta 2 and iPhone OS 3.1 beta 2 are now available on the iPhone Dev Center. These versions are for development and testing only and should be installed on devices dedicated to iPhone OS 3.1 beta software development. Please read the iPhone OS beta Pre-Install Advisory and the iPhone SDK 3.1 beta 2 release notes before downloading and installing.
If you’re using an unlocked iPhone 3G/3GS, stay away from this update. This update permanently upgrades your baseband and fixes the exploit that the ultrasn0w and purplesn0w use!
This new update will fix the exploit used by ultrasn0w and purplesn0w. So, if you’ve unlocked your iPhone 3G and iPhone 3GS, it’s recommended not to update or stay away from this update. But if your iPhone already upgraded to iPhone OS 3.1, follow this guide to downgrade iPhone OS 3.1 to 3.0 .
What will you get in iPhone OS 3.1 beta2?
* Developers can now work on their iPhone or iPod Touch over WiFi
* Bug fixes to Xcode and various parts of the iPhone and iPod Touch software
* IPCC Tethering no longer works.
