Thank you for contacting the Sony Xperia support centre regarding updates.
With regards to your enquiry, the update for Android 4.0 Ice Cream Sandwich is due for the Sony Ericsson Xperia Arc S in late May/early June.
We hope this information helps.
For the latest news, information and product support please visit www.sonymobile.com.
If you require any further assistance then please do not hesitate to respond to this email or call our customer support on 08705 237 237. Should you choose to contact us via an alternative channel, one of our agents will request a unique field from you and would suggest providing your Email address.
Please be aware that should you not respond within 5 days of this email your query will be automatically closed. Any further communications will not reach our support and a new query will need to be raised.
Sony Xperia UK Customer Services