As per the latest reports floating around the web world, many users of Sony Xperia S are facing difficulty in upgrading their phone to the latest version of Android Operating System that is ICS. ICS was recently released for the Xperia S.
The error which most of the users are experiencing is that when they try to update their device than a error will occur saying that your device is running the latest version Android 2.3.7.
Sony has officially acknowledged the problem and ask affected users to stay clam while they are searching for the quick fix to the problem.