It's bad news for Xperia Ray, Arc and Neo owners on O2's UK network, as the carrier's reported it won't be updating these Sony handsets to Ice Cream Sandwich. O2 claims it has tested three versions of the OS update and decided not to approve it, due to increased hardware requirements resulting in "speed and performance" issues. This is curious, since Sony itself had no problems getting Android 4.0 up and running on the devices -- even if it did take a while. If you know your way around a ROM, you probably stopped scoffing Gingerbread a long time ago. However, if you're yet to tinker and ain't scared by O2's "you can't go back" warnings, an hour or two on some specialist forums should have you sticky in no time (at your own risk, of course).
Update: O2's been in touch assuring us the decision was not taken lightly, and that although Sony has released ICS for these handsets, they did so with clear disclaimers on performance concerns (see the Sony source below).