HTC have been promising to release the Android 4.0 Ice Cream Sandwich for the HTC Thunderbolt for a while now, and according to HTC the update for the device should be available ‘soon’.

HTC USA HTC USAVerified ‏@HTCUSA

@louie_397 ICS will be here soon. Thanks for your continued patience!

We have no idea when HTC will finally release the Android 4.0 Ice Cream Sandwich update for the HTC Thunderbolt, as soon as we get some more information onb when it will be available we will let you guys know.

Source Android And Me, HTC Twitter