It isn't about the provider, it's the speed we care. Are they going to let my router able to get stable internet from LTE technology? I have desktop and laptop

It isn't about the provider, it's the speed we care. Are they going to let my router able to get stable internet from LTE technology? I have desktop and laptops and I don't want to add wireless card to my desktop in particular. I rather serve things over my own router. How are they going to market to home users? FIOS has been said to be high speed, reliable, fiber-optic. Great. I am willing to add $20 to my monthly bill to get one. And how can they drop the agreement like this?