Android 4.4.3 landing imminently?
Sprint says a new firmware update will begin rolling out for the Nexus 5 from today. The carrier says this update will enable Sprint Spark on Bands 26 and 41, along with providing "miscellaneous Android updates." The Android build number to watch out for is KTU48F, and since Sprint's SKU is identical to the U.S. unlocked model, all Nexus 5 models could be seeing an OTA today.
It's likely this is the previously mentioned KitKat maintenance release, which will fix camera bugs and other issues — and presumably this will warrant a bump in version number up to Android 4.4.3. That means we could be seeing this new Android version across other Nexus devices before too long.
To manually check if it's waiting for you head into Settings>About Phone>System Updates. We'll keep you posted with further developments as we get them.