ASUS is now rolling out Ice Cream Sandwich update for Transformer Prime TF201. ASUS via its Facebook page, announced that all TF201 owners in the United Kingdom can expect to see the OTA update anytime now.
All you Transformer TF201 Prime owners in the UK should be receiving your new OTA Firmware update shortly - we've just received it on our test unit. We'll send a changelog your way before the end of the day!
Source:- ASUS UK Facebook