The new Xperia Z Ultra upcoming 6.4-inch first firmware from Sony 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 (14.1.B.0.438) has been certified earlier than expected, there is a chance that we may see the HSPA+ version launch earlier than that.
Source :Xperiablog