After the iPhone OS 4.0 Beta 1, Apple has pushed the iPhone OS 4.0 Beta 2 build 8a248c. Along with the iPhone OS, Apple also released the iPhone OS 4.0 SDK Beta 2 build 10M2240. iPhone OS 4.0 is now released only for the Developers and not for the general public. General users will get the iPhone OS 4.0 hands-on with the iPhone HD. So if you are a developer enrolled with the iPhone Developer Program, you can download the iPhone 4.0 Beta 2 Firmware. iPhone 4.0 OS Beta 2 is available for iPhone 3GS/3G and iPod Touch 3G/2G. Some of the features like Multitasking and Wallpapers are not supported on iPhone 3G and iPod Touch 2G.

You might have already read that iPhone OS 4.0 Features Multitasking, Folders, New Mail Features, iBooks, Enterprise, Game Center and iAd. Apple added the much awaiting feature Multitasking to iPhone With iPhone OS 4.0 While Preserving Battery Life and Performance.

Updates From iPhone 4.0 beta 2 Firmware

• iTunes still does not support folders synchronization.
• The time for task completion in multitasking has been changed from 5 to 10 minutes
• Fixed Visualization problems in GameCenter.
• New way to choose a custom wallpaper. Now a screen appears with a click and choose to set it on LockScreen or on the springboard.
• Earlier it was not possible to invoke the pop-up controls music with the double click on the Home button when you had the music playing. Now this feature is enabled.
• Problem with the camera Roll. The screenshots are not saved in your images and even photos with the camera.

If you are an end user and rely on Unlock then do not update to the iPhone OS 4.0. Luckily if you have got an iPhone 3G you can read this – “How To Jailbreak iPhone 3G on 4.0 Firmware With Redsn0w 0.9.5“, “Downgrade iPhone OS 4.0 Baseband 5.13.03 to 04.26.08 BB Using Fuzzyband” and “How to Unlock iPhone 3G on 4.0 Firmware Using Ultrasn0w“.

Download iPhone OS 4.0 Beta 2

Download iPhone OS 4.0 beta 2 (iPhone 3GS) – iPhone2,1_4.0_8a248c_Restore.ipsw or iphone_os_4_beta_2__iphone_3gs__8a248c.dmg

Download iPhone OS 4.0 beta 2 (Phone 3G) – iPhone1,2_4.0_8a248c_Restore.ipsw or iphone_os_4_beta_2__iphone_3g__8a248c.dmg

Download iPhone OS 4.0 beta 2 (iPod Touch 3G) – iPod3,1_4.0_8a248c_Restore.ipsw or iphone_os_4_beta_2__ipod_touch__3rd_generation__8a248c.dmg

Download iPhone OS 4.0 beta 2 (iPod Touch 2G) – iPod2,1_4.0_8a248c_Restore.ipsw or iphone_os_4_beta_2__ipod_touch__2nd_generation__8a248c.dmg