I'm using a grandfathered $20/mo 5GB data plan that throttles if it goes over...
I have 600 minutes (we barely talk on the phone) for a family plan, two smartphones ($20/data each), insurance on the smartphones ($8/each I think), unlimited texting for families ($10), one add-a-line for my mom ($10) and then $5 for something else I have registered.
I spend about $140/$150 (with taxes)each month on three lines.
Of course I will be fighting tooth and nail now to keep this plan since T-mobile got rid of subsidies. But that's just how it is when you are grandfathered in anyway... last upgrade I did was at Sam's and it went great.







