Sony’s first firmware for is upcoming 6.4-inch Xperia Z Ultra has been certified by the PTCRB. Firmware build 14.1.B.0.438 is likely to represent Android 4.2.2 and went live for the HSPA+ version of the handset (C6802, XL39h). The phone is expected to launch in Europe with LTE during September, but as this firmware has been certified earlier than expected, there is a chance that we may see the HSPA+ version launch earlier than that.
Via Xperia.cz.
Thanks nikol and xperiax10.awesome!