Just received this item in mail today. I was pretty excited! However, in the final step of installing the door bell, i found it has one missing screw that is required to secure the unit on the back wall!!! Also, downloaded Skybell app 1.6.7 on my iPhone 6+, created an account, then the app just keep crashing as I hit "Add Skybell function"! Absolutely useless!!! Do not download version 1.6.7 if you have old version!!
Fishbreath79 about SkyBell Classic, v1.6.7