EM12 Help with band lock/aggregation

Hey Guys,
I really need some help here. I have a router with a EM12 modem in it and am having issue with it staying on a specific band/aggregate bands. I need to know if there is a simple command to have it lock to bands 2 and 14 and aggregate them? Any help here appreciated…

I have also the EM12



This is for default lte band