Does Verizon sell a device that allows one to make landline calls using one's cellphone? What is it called? What does it cost? Can I hook it up myself? Would I lose my landline number or would it be forwarded to my cellphone? Can I switch from digital voice to copper phone lines? If I'm able to do that, would that eliminate the need for battery backup of the digital voice? Would that be cheaper than digital voice? Is it possible to hook up my router via an ethernet port instead of coax cable? There is an ethernet port on the ONT. I'm thinking about getting an Apple Airport Extreme & the Apple forum people don't recommend daisy-chaining a FIOS router to an Apple router. It's my understanding that the TV programming information comes over the coax cable, so I'd have to have room on the table for both the FIOS router & the Apple router. What will it cost me to make these changes?