I was also wondering this, i have recently just got my first ever android, on the 'three' network and so far im delighted with it, in the main, but as you may or not know, the xperia s only came installed with gingerbread, and, after hearing so many bad reviews from people who upgraded to ice cream sandwich, i have decided to wait it out until i get access to jelly bean. this seems like the most sensible option for me, and seeing as how the latest model phones are coming with jelly bean pre installed form the factory, im sure it cant be much longer now until we get the jelly bean update. fingers crossed.