After calling Motorola I'm pretty sure we have to wait till the carrier okay's it. When I called Motorola they just sent me the same link I already had for the files, which only had what's current. I was on T-Mobile for about a week and after i changed my SIM back to AT&T my phone said i had an update....don't know why..I downloaded it but forgot i still had twrp instead of stock. It rebooted (after not installing) and when i checked my phone said up to date and still on 4.4...
Sent from my XT1053 developers edition using xda app-developers app