In most of Frontier's service areas "broadband" counts as shitty adsl where you are lucky if you get 3mb/s down. They don't need caps, because you can't download anything anyways.
Seriously, if you've got the choice between Frontier and 4G connection, go with whatever 4G provider there is. Praise FSM if you've got Comcast in a Frontier service area. Seriously, Frontier is that bad, you will be BEGGING for Comcast. They're that bad.
Frontier pretty much has taken over the unprofitable areas of Verizon's wireline business. They have no desire for infrastructure upgrades, or really anything other than getting you to keep paying.