A:Answer Hi Barry,
You will need an internet connection through an internet service provider such as Comcast/Xfinity or other in order to effectively use any router. If you don’t have a connection, you will not be able to install a new router.
There is no current router I’m aware of for non-commercial or home use that uses phone lines to connect to the internet.
If you have more questions, talk to your local Best Buy store geek squad.
Good luck with your upgrade.