Motorola's David Schuster has basically become the defacto news source for Motorola update information lately. Sticking to that tradition, Schuster has taken to Google Plus once again with a slew of information on different updates, including the availability of
Android 5.1 Lollipop

for the
Moto X (2014)

on U.S. Cellular and AT&T, along with some updates on other devices.