There is no release timeframe available for the moment
Although HTC has already started the rollout of the Android 4.0 Ice Cream Sandwich update in Europe, Three UK customers who own the device have yet to receive it.The good news is that the Android 4.0 build for HTC Sensation devices purchased via Three is now in testing. The bad news is that the carrier cannot confirm a certain timeframe for the release.
The information comes directly from Three UK’s support social network account: “ICS for the HTC Sensation is still in testing, We can’t confirm a timescale at the moment but will tweet when it’s available.”
HTC Sensation owners will be able to upgrade to Ice Cream Sandwich within the following weeks, but only if the testing process is successfully completed and no bugs are found. Stay tuned for more updates on the subject.