LM1200 4G modem with Orbi RBK50

Hi, i have an orbi RBK50 router and Satellite currently used with NowTV broadband. I live in a rural area so only get about 7-9mbps speed and was considering getting a 4g modem like the LM1200 and using an unlimited SIM in it and hopefully get a better speed.

1) Will the modem work ok with my Orbi router and Satellite?

2) Other than making sure whichever SIM i go for has good signal where i live, is there anything else i need to consider by using a 4g sim for my home broadband rather than through a wire?

Thanks