In the beginning of this thread, you said "Smartthings uses very little data so I never get close to the 500MB level even if my internet out for a couple of days."
Do you estimate Smartthings would exceed 500MB in used data for an entire month? In other words, why not use the Netgear 4G LTE Modem for Smartthings only and keep everything else in you house on your default modem/router? That way there would never be the need to switch over.
I appreciate your feedback! Thx.