Sony Ericsson has officially announced the timeline for the Android 4.0 Ice Cream Sandwich update. Last week, Sony Ericsson released an Alpha build of Android 4.0 ICS for select Xperia devices. But finally the Xperia 2011 device owners can expect to receive Android 4.0 Ice Cream Sandwich by March end and early April 2012. Even though it is three months from now, pre-defined timelines are good. 
First generation of Sony Ericsson Xperia series smartphones received lukewarm response due to lack of updates. However, the company has learned from its past experiences and now became active when it comes to Android updates.
As per the official Sony Ericsson blog, the Android 4.0 ICS update will be pushed publicly and will take a while for every region. Of course the carrier locking and region based customisations will be taken into account. We hope that the India gets regional language support bundled with the release.
The Android 4.0 ICS update will be pushed over the air via 3G or WiFi networks to the 2011 Xperia devices. Sony Ericsson’s 2011 Xperia Portfolio includes: Xperia Arc and Arc S, Xperia PLAY, Xperia Neo, Xperia Neo V, Xperia Mini, Xperia Mini Pro, Xperia Pro, Xperia Active, Xperiaray and Sony Ericsson Live with Walkman.
Recently, Samsung announced the list of devices that would be getting the Android 4.0 Ice Cream Sandwich update in the first quarter of the year 2012 which can be January to March duration. HTC, Motorola and LG are yet to announce the approximate timelines when the Android 4.0 ICS update for the respective devices.