According to Sprint support, the Nexus 5 is set to receive an update this week to Android 5.1.1 build LMY48B (Sprint says it was supposed to start May 11). The update is listed as being nothing more than the update to 5.1.1 with included “security enhancements.” Tough to say what those security enhancements are, but in general, the update is expected to be quite minor.
LMY48B is a brand new never-before-seen build number for Android, so that’s at least something. Assuming Sprint is correct, the update will also be accompanied by a factory image at any moment. We’ll let you know when that shows up.
Until then, be on the lookout for the over-the-air update and grab that .zip file URL. Here are instructions on how to do that.