A number of users are reporting that the Android 4.0.4 Ice Cream Sandwich update is now available on the Sony Xperia sola. The 6.1.1.B.1.10 firmware update is currently rolling out in a number of countries including Indonesia, India, Philippines and Greece. There is no FTF firmware file for the update just yet, but it should be a matter of time before it appears. Now it is just Sony Xperia U owners waiting for the ICS update, we’ll report back as soon as it goes live.
Update: Keep an eye on this xda thread for the FTF file.
Via xda-developers. Xperia sola ICS