Apple has just released iOS 5 beta 2 for iPhone 4, 3GS, iPod touch 4G, 3G, iPad 1, 2 and Apple TV 2G. This version is only available for developers. So only registered developers can download iOS 5 beta 2 for all iOS device from iOS Dev Center.

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As you know that Apple announced iOS 5 for first time in the last WWDC 2011. iOS 5 is loaded with more than 200 new features. After WWDC 2011 Apple released iOS 5 beta 1 on June 7th.

The first changes noted include:

- Wireless syncing has been enabled for Mac OS X computers
WiFi Syncing

In iOS 5.0 beta 2, wireless syncing is now available for the Mac. It requires iTunes 10.5 beta 2 and OS X 10.6.8 or Lion. You will see an option to enable wireless syncing when you connect your device to iTunes with the USB cable. It is recommended you perform your initial sync with a cable after restoring your device.

Wireless syncing is triggered automatically when the device is connected to power and on the same network as the paired computer. Or, you can manually trigger a sync from iTunes or from Settings -> General -> iTunes Sync (same network as paired computer required). Be sure your device is plugged into a power source when performing Wireless syncs.
If you find issues with apps, media and/or photos synced to your device, you can reset then resync. From Settings -> General -> Reset, choose Erase all Content and Settings. Then reconnect to iTunes and sync again.

In this beta, iTunes may incorrectly report Photos as "Other" in the capacity bar. Photo syncing otherwise works as expected.
Download iOS 5 Beta 2 ipsw - iPhone, iPod touch, iPad and Apple TV 2G