Engadget
How to save money on your phone bill with an MVNO

MVNOs lease network capacity and sell prepaid plans such as Mint Mobile’s $15-per-month 6 GB option and Visible’s $25 unlimited-data plan with taxes included. US Mobile allows custom or family plans on any major carrier, while Google Fi offers a $65 Unlimited Premium plan with 50 GB of worldwide data, all without post-paid contracts, credit checks, or bundled extras.