iOS 5.1.1

This update contains improvements and bug fixes, including:
• Improves reliability of using HDR option for photos taken using the Lock Screen shortcut
• Addresses bugs that could prevent the new iPad from switching between 2G and 3G networks
• Fixes bugs that affected AirPlay video playback in some circumstances
• Improved reliability for syncing Safari bookmarks and Reading List
• Fixes an issue where ‘Unable to purchase’ alert could be displayed after successful purchase

For information on the security content of this update, please visit this website:
http://support.apple.com/kb/HT1222

Baseband Changes:
iPhone 3GS: 05.16.05
iPhone 4 (GSM): 04.12.01
iPhone 4 (CDMA): 3.0.04
iPhone 4S: 2.0.12
iPad Wi-Fi + 3G: 07.11.01
iPad 2 Wi-Fi + GSM: Unknown…
iPad 2 Wi-Fi + CDMA: Unknown…
iPad (3rd generation) Wi-Fi + 4G (LTE) (AT&T/global version): 1.0.11
iPad (3rd generation) Wi-Fi + 4G (LTE) (Verizon version): 1.0.11

iPhone iOS 5.1.1 | iPhone 3GS | iPhone 4 (GSM) | iPhone 4 (CDMA) | iPhone 4S |
iPod Touch iOS 5.1.1 | iPod Touch 3rd Gen | iPod Touch 4th Gen | iPod Touch 4.5/5th Gen |
iPad iOS 5.1.1 | iPad Original | iPad 2 (Wi-Fi) | iPad 2 (Wi-Fi+GSM) | iPad 2 (Wi-Fi+CDMA) |
Unknown | iPad2,4 | iPad3,1 | iPad3,2 | iPad3,3 |