At our beach house over Thanksgiving the Internet /wifi was wonky.Weak ,in and out not working much.Our cable was strong.We have basic there ,the only way to have TV there.Normally it is the cable if something is wonky.Cell phone often is wonky .We have a land line because to depend on a cell is worrisome.
Our teens were in withdrawal .I always thought as long there was cable...endless sports and Sci Fi ...it would be fine.After the first day on Wed they were ok but I had never realized how much they stayed in contact with their friends.It was panic for them when they realized they couldn't text our address to friends coming down...lol...land line ??????
For your teen and you what is more important Internet or TV/Cable.