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I asked some questions about rooting before but I didn't realize it all was supposed to be done on an MT11a with Android 4.0.4. I have 2.3.4, so I just rolled everything back. Where and how can I install this version? I am seeing videos (YouTube, for example) where people have this OS installed in this very same device.

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Did you have tried Sony Update Service? download this software and follow instructions to update your phone easily to an original stock ICS ROM. – yrajabi Sep 2 '12 at 21:47
possible duplicate of When will my device get the Android 4.0 update (Ice Cream Sandwich)? – Chahk Sep 3 '12 at 20:39
Not really a dupe, @Chahk (Peter and some of us had that yesterday on chat), as ICS is already released. So the question is not when -- but rather how. – Izzy Sep 3 '12 at 21:32

You might want to visit the Update page for Neo V for closer information on how to update. It not only tells you what has changed, but also provides you with the required downloads.

The link is to the UK version. I could not find any link for Argentina, and the Brazil page does not even list the Neo V. So you might want to check around for yourself -- at least that's somewhere to start with.

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