Joined BETA program and installed 7.1.1. Immediately cancelled the program and went back to 7.0. Why? Because I seriously injured my hands in an accident and have a conditional REQUIREMENT to use "OK Google" verbal activation when my phone is locked and screen is off. I need to be able to make calls and send text messages with little to no use of my hands. This would not work on 7.1.1. I'm sure it's probably because it's in BETA, but I can't do without "OK Google" from the lock screen! I MUST be able to unlock and use my phone by voice. I'm hoping this is just because it's in BETA, because of Google takes this away from Nexus devices (to support their Pixel brand), I'll have to buy an iPhone or go back to my Windows Phone.