Apple preveiwed major update iPhone OS 4 on April 8, 2010. iPhone OS 4 comes with more than 100 new features for the user. Top features include Multitasking, Folders, Enhanced Mail.app, iBooks, Enterprise, Game Center, and iAd.
I tried to install iPhone OS 4.0 beta (8A230m) to iPod touh 3G.
Apple has made available iPhone OS 4 beta to registered developers only. Registered developers can download iPhone OS 4 along with SDK 4.0 from the iPhone dev center. You can download iPhone OS 4.0 only if you're a registered Apple developer. Download iPhone firmware 4.0 from iPhone Dev Center.
