We are overpaying for phone plans from Verizon, AT&T and T-Mobile. Budget wireless services, similarly fast and robust, can save thousands.
P.S. Some of the 'big' carriers, now and then, offer much less expensive 'plans'. Some event beat the prices in this article, if your 'Data' needs are limited.
I switched to US Mobile last year. I had a rough month or two with data not working properly, but it's smooth sailing now for $20/month for 5GB of data.