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that mean that it hasn't been released in your country, you have to wait for it to be approved and released.
where did you read this?
malaysia
i use update service , Sony PC Companion 2.1 cheak update, no gv the android 4.1 update~
help~!
if you can not wait this is how to manually update your phone
http://talk.sonymobile.com/thread/41609
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