On June 21, Sony has finally decided to release the official Ice Cream Sandwich update for the Xperia S, meeting the Q2 target, but unfortunately things were not as smooth as everyone expected. Users were reporting problems updating even with phones having SI numbers for which Sony confirmed the updates.
Now the manufacturer has updated the status of the refreshes and told the world they would re-release the firmware updates. The official wording says: “We have identified the earlier issues and are working to implement the solution across all available ICS updates. This process will happen gradually beginning now. Feel free to run your update again now to see if it is available, or wait and we will inform you here when all updates have been re-released“.
Source: Sony Xperia Support Forum