There is no official change log on the update notifications, but various users are reporting a noticeable performance boost once they've updated their Z2 devices.
The new firmware weighs about 121MB and is available both over-the-air and via the Sony PC Companion Suite. The update is available in the Nordic regions, Germany and Russia among other countries.
If you've updated your Sony Xperia Z2 or Xperia Z2 Tablet feel free to share your experience in our comment section.
Also don't forget to check out our Sony Xperia Z2 review.
Thank you, Ric, for the tip!