I'm surprised more people aren't doing the opposite. There are pay as you go phone plans that cost hardly anything. Meanwhile there is free WiFi almost everywhere, including at home. If you have broadband. So pay the cable company for fast internet and pay half that or less for mobile service, then connect your mobile to WiFi 97% of the time so you hardly use any mobile data.
The math gets even more dramatic if you have multiple people living in the same place. Broadband price gets divided by however many people you have there, higher cost of an unlimited phone plan get multiplied by the same number.
The math gets even more dramatic if you have multiple people living in the same place. Broadband price gets divided by however many people you have there, higher cost of an unlimited phone plan get multiplied by the same number.