Cisco LTE router - monitoring switching to 4G network

Cisco LTE router - monitoring switching to 4G network

Hi ALL!
I have Cisco C921-4PLTEGB with integrated LTE slot.
We use booth type of internet: cable (primary) & LTE (secondary)
What is the best way monitoring switching from cable to LTE  via OpManager ?
I need info about
1) q-ty of switching
2) duration LTE using
3) Total LTE traffic per day/week/month

Any idea ?