1. You do not need a Meraki Go license to have the devices. If you want to add on a Security subscription there is a license for that that you'll have to purchase it in addition to your GX.    2. Yes, you purchase the devices and onboard in the app.    3. Other than the original manufacturer warranty there isn't an additional warranty.  You would need to go through the store you purchased it from, not through Meraki.   4. You don't require a subscription to make a Meraki Go account, just an email address.  ... View more