As promised earlier Apple has released a Firmware update that would fix proximity sensor issues. Earlier Apple released iOS 4.1 Beta 1 that fixed the signal bar issues. strong>iOS 4.1 Beta 2 is released for iPhone 4, 3GS, 3G and iPod Touch. iOS 4.1 Beta 2 build is currently available for Developers only. The SDK has a build numbered 10M2305a and the firmware is build 8B5091b. If you are currently enrolled in the iPhone Developer Standard or Enterprise Program then you can download iOS 4.1 Beta 2 from Apple Developer Connection page.

If you rely on unlock then do not upgrade your iDevice as the iOS 4.1 Beta 2 contains a new baseband. If you are on official carrier then download iOS 4.1 Beta 2 if you are facing issues with the proximity sensor. Just visit iPhone Developer Center to download iOS 4.1 Beta 2 for iPhone 4, iPhone 3GS, iPhone 3G, iPod Touch 3G and iPod Touch 2G.

Download iOS 4.1 Beta 2