au by KDDI has become the second Japanese carrier (after NTT docomo) to launch the Xperia Z4 today. The au Xperia Z4 (SOV31) has also received a day one firmware update, much like the docomo version, to fix issues around media volume and call syncing. Users have already posted unboxing pictures, check out some below including a comparison against the Xperia Z3 and a display comparison against the Samsung Galaxy 6 Edge.
Via SMHN.info.
