An Android 4.4.3 update is almost certainly on the way, although we’re not quite sure when, as references to the new version of Android have cropped up yet again.

The most recent sighting comes as an Xperia Z Ultra Google Play Edition smartphone passed through Bluetooth SIG certification. The listing comes with a new software version for the handset labelled “KTU72.S1.3013”, the KTU72 bit is the build name for Android 4.4.3. Unfortunately, the Bluetooth listing can’t tell us when the update will arrive, but it’s a pretty good sign that it’s on the way.

Following that, Google itself let the update slip in a change log for its Edu Device Setup app on the Play Store. Under the “what’s new” section, the app lists “support for Android 4.4.3 and non-Nexus tablets”. Hopefully this means that Google is preparing to ship the update anytime soon, and that it’s not just an innocent type.

We first heard mention of the update back in March, where we received the first hint that a 4.4.3 update might be on the way to fix the Nexus 5 camera bug. More recently, just last week Sprint suggested that the update would be rolling out immediately, although that doesn’t seem to have materialized yet.

Evidence is mounting that Android 4.4.3 is on the way, but the big question still is when.