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You have to wait for the update to be approved and released in your country, if your phone is or was locked to a carrier/network branded, you have to wait for them to approve and release the update.
Perhaps he got the phone from a different country
or
Manually update his phone
How to manually update, downgrade, root 2013 Xperias
Have you checked with SUS or PCC?
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Ok, you have to wait for the update to be released, not in your country (Philippines) but the original country the phone was released
Hi Yugs
I already updated mine last week. Updated it through SUS, although I checked first through PC Companion. What's your model number? Mine is a C6903 so there might be some difference in firmware update time if we're different models.
Also, an additional tip would be to maybe try it with multiple PCs (if you have more than one). I'm not sure but I saw that sometimes, user reports that they get update when they do it through another PC.
Let me know your status 
I bought it through Kimstore. Not sure which country it comes from though.
Also, one other thing is I downloaded my update possibly through a ISP based on Singapore... I'm not too sure though if that is the case, I might need to check this week.