Sony Mobile has confirmed that Android 4.0 Ice Cream Sandwich update for 2011 Xperia smartphones will start from mid-April 2012.
The first Xperia models to receive the upgrade will be Xperia arc S, Xperia neo V and Xperia ray. Following on, Xperia arc, Xperia PLAY, Xperia neo, Xperia mini, Xperia mini pro, Xperia pro, Xperia active and Sony Ericsson Live with Walkman will receive their scoop starting from the end of May/early June.
Previously, Sony stated that Android 4.0 update for the Xperia arc S, Xperia neo V and Xperia ray would commence from end of March/early April. This implies that Sony delayed the ICS update for Xperia line-up and not only that now you won’t receive any update requests or notifications and the update will be available for download via PC Companion and Bridge for Mac (i.e. not over the air via 3G or WiFi).
Source:- Sony Mobile