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When on when will my unlocked X10a get the performance update…
Model – X10a
Country – Australia
Brand – 3
Phone software version – 1227-4612_R1FA014 GENERIC
When ever I try the update on the phone or via SEUS it says I have the latest software.... 
It seems your region hasn't had the update yet but they might just be waiting for the Android 2.1 which is due this month.
I use the phone in the UK and I thought that this region had had the update.. Not sure how it works with the roll out of the update...
Thanks for the suggestion - more than I got from the UK, US or AU SEM support teams... As the UK sent me to the US the US to Aus then to be told that the UK would have to deal with the query as that is where I am based..