It should be noted that Matt over on motorola support forums states that using the phone without the shattershield lens voids the warranty:
https://forums.motorola.com/posts/6ec695482f
Consider yourselves warned...
I vote this post be removed as a sticky...
The warranty including the terms of the shatter shield guarantee can be found here:
https://motorola-global-portal.cust...45878694/redirect/1/filename/68018077001A.pdf
I have thoroughly read it and could not find the "tie-in sales" provision (read the Magnuson-Moss Warranty Act for details), requiring the use of ONLY the Motorola protective lens to maintain warranty. Of course, if you damage the interior lens when removing the consumer replaceable protective lens or do not replace it with a comparable protective lens, then that wouldn't be covered. However, removing the lens AND replacing it with a comparable non-Motorola protective lens DOES NOT void warranty. In fact, even if you just removed the protective lens but didn't put anything back, should the power button stop functioning, then Motorola would still be legally required to repair the power button under warranty. This is like if you replace the oil filter in your car with a quality filter not from the manufacturer...the manufacturer would still be legally obligated to provide warranty service on your car.