If you have Comcast, look at xfinity mobile....they use Verizon towers and their WiFi network. If you are not aware, every router rented from Comcast includes an additional “Comcast WiFi” network also that any other Comcast user can sign onto using their credentials so we often have WiFi whenever we stop anywhere.
There is no line charge and each phone line has 100M of data/month. You must buy one of their phones though.
Our highest bill for a month was just under $38- $21 for 2 new iPhone 6S, $12 for 1G of shared data, almost $5 in taxes/fees. We have had a month as low as $25 by not using more than the 100Mof data. Haven’t done it yet but will get unlimited data on one line ($45/month) and use it as a hot spot when traveling.
Our Verizon bill for 2 phones + 2G of data was $110/month and over $200 for unlimited data when traveling.