Why it's hard to get an iPhone on a budget wireless carrier

Got a smartphone? Then you must also have a wireless plan, and if you live in the U.S., chances are it's with one of the big four — Verizon, AT&T, T-Mobile, or Sprint.

However, there are a bunch of other carriers you may have seen around, carriers with names like Cricket, Jolt, metroPCS, and Virgin. These are MVNOs, or mobile virtual network operators, and they exist by leasing spectrum from the major carriers. They're also often a better deal, thanks to selectively targeting demographics and relying heavily on Wi-Fi to support the network.