Google is currently working on the next version of Android, and it’s rumoured to be coming in the next few weeks.
Android 4.4.3 isn’t expected to be earth-shattering, but it will likely fix a bug in the Nexus 5’s camera that has been found to chew through battery.
Android 4.4.3 is under testing. Build number is KTU72B. Probably it will fix known camera bug.
— LlabTooFeR (@LlabTooFeR) March 24, 2014
While the update will likely cycle through to other Nexus devices, and eventually reach new devices if they are released between April and June, Google is expected to launch a brand new version of Android at Google I/O at the end of June.