[Q] Xperia Z3 camera updates topic

Hello,
I've noticed some "artifacts/noise", with a recursive pattern, in some photos of the Sony Xperia Z3 in "some" smartphone websites (I don't know if I can say the names :p).
They were made in manual mode 20mpx.
Are there updates/firmware for the camera that have improved the final result versus the early reviews?

Thanks a lot.