A member of XDA-developers is claiming that he received an OTA firmware update for his Xperia Z Ultra (C6802, XL39h) which could be Android 4.3. The build version was 14.2.A.0.290, which compares to the current version of 14.1.B.2.257. The user wasn’t able to install the update, which clocked in at 228.2MB, suggesting it very well could be the Android 4.3 update given the size. We can’t translate what the text says, but if anyone can help, let us know in the comments below. In the meantime, the Android 4.3 update is hopefully not too far away know, so we’ll report back as soon as we hear of any meaningful movement.