Carrier Buyer's Guide

Straight Talk supports the Big Four networks making it a breeze to bring your own phone to its service, but Boost Mobile has more opportunity for savings and a newly-expanded T-Mobile-based network.

If you have an unlocked phone that works on the Sprint network, you should be able to try out Boost Mobile but most Sprint and Virgin Mobile phones can't be activated.

While a locked T-Mobile phone won't work with Mint Mobile, getting it unlocked or buying a new device that is compatible is pretty easy.

Have a Sprint phone that you want to bring over to Boost Mobile? Here's how to do it.

There are dozens of prepaid and smaller alternative carriers in the U.S., and increasingly people are buying phones outright, or bringing them over from another carrier, to save some money.