Android 4.3 now rolling out for Sony Xperia Z1 and Xperia Z Ultra As always, I expect UK unbranded handsets to be lagging behind, but there are several confirmed updates on xda. If you like a bit of bling, you can apparently theme pretty much everything from the navbar up. More themes are on the way as well. Take a look at this one: Changes in 4.3 Z1 - xda-developers (small changelog included as well). The bootloader unlock/camera bug is also fixed so that means development should pick up a bit!