iOS update 5.1.1

Apple has rolled out an update yesterday for all iOS devices which offers a few tweaks and improvements. These include:

*  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.