4.4.4 on o2

[Timax777]

when will uk o2 users see 4.4.4 ?

[azzido]

Hello guys,
4.4.4 is coming to Z2.
It took a lot of time, we are geeting it after Z1 and even after first Z. 
Hoping for new features from Z3, that would make sense why did we wait so long.
Can't wait for it

[Thommo]

We are unable to answer such questions and have no influence to be able to acquire the answer - You need to contact Xperia care http://www.sonymobile.com/global-en/support/contact-us/ - however if your phone is locked to o2 then you need to ask them as they will be the one's to authorise the update to you