A screenshot of an as-yet-unseen firmware build for the Sony Xperia Z1 has appeared. It shows firmware build 14.1.G.2.213 for the HSPA+ version of the Xperia Z1 (C6902). This is still an Android 4.2.2 update with the 3.4.0 kernel.
There is a big jump in build number from the current firmware (14.1.G.1.534) i.e. this new firmware is in the form 14.1.G.2.XXX rather than the current 14.1.G.1.XXX. However, the author says the update mainly brings optimised power consumption and performance enhancements. There is no sign of this firmware on the PTCRB site yet, but we’ll keep you posted if it starts to roll out.