iPhone 4 iOS 4.1 Beta2 firmware along with SDK for iPhone 4, iPhone 3G, 3G and iPod Touch 2G and iPod Touch 3G has been released and is available for download. If you have a membership of the iPhone Developer Standard or Enterprise Program, you can download iOS 4.1 beta 2 (build 885091b) firmware for iPhone 3G, 3GS and iPod Touch 2G and 3G now!

iOS 4.1 Beta 2 Change Log
- iOS 4.1 Beta 2 contains a new baseband 05.14.01_BL01 for iPhone 4, 3GS and 3G. If you rely on an unlock, DO NOT update to Beta 2.
- Gizmodo is reporting that iOS 4 beta 2 build has fixed the proximity sensor issue which was annoying some iPhone 4 users since launch.
- The Next Web is reporting that iOS 4.1 may have fixed the slowness issue of iOS 4 /4.0.1 on iPhone 3G. If not, you may follow some of the ways to speedup iOS 4on iPhone 3G.
- Fixed bug of displaying the MMS on iPhone 3G. In the previous version, the image contained in multimedia messages, was not displaying correctly.
Note: If you have unlocked your iPhone 3G or iPod Touch 2G then you must stay away from iOS 4.1 BETA 2 update! However, you can jailbreak your iPhone 3G or iPod Touch 2G running on iOS 4.1 Beta 2 firmware. Steps are posted here.
Download iOS 4.1 Beta 2 and SDK
Yu might also like to check out:
- How to downgrade iOS 4.0 to iOS 3.1.3 iPhone Firmware, Fix Restore Errors
- How to Jailbreak iOS 4.1 iPhone 3G/iPod Touch 2G with Redsn0w 0.9.5
- How to Unlock 05.12.01, 04.26.08 to 05.13.04 Baseband on iPhone 3GS/iOS 4 with ultrasn0w 0.93
- How to Jailbreak iOS 4.0.1 iPhone 3G with Redsn0w 0.9.5, iOS 4.1 Beta with Sn0wbreeze
