How Do Prepaid Plans Work?

Unlike postpaid plans that carry multiyear contracts, prepaid plans are usually structured as limited-term agreements. Prepaid plan customers pay in advance for a specified amount of data, plus access to talk and text networks.

Prepaid cellular services almost universally use the same networks as the big three wireless phone carriers: Verizon, AT&T, and T-Mobile. How? Infrastructure that provides cellular service often delivers more network capacity than necessary at any particular point in time. Instead of leaving the network unused, companies that build new cellular networks can rent out the excess.

Many prepaid phone plans are run by a mobile virtual network operator (MVNOS) that buys access to a major phone carrier's network (see more below on MVNOS.) The major cellular networks also offer their own prepaid services, and a series of acquisitions over the past 10 to 15 years has led to a situation where most MVNOs are actually owned by a network operator: Verizon, T-Mobile, or AT&T.

What Is an MVNO Phone Carrier?

An MVNO, or mobile virtual network operator, is a phone carrier that does not own its network infrastructure. Instead, the MVNO buys bulk access to another carrier's network and charges customers to use data and service. This structure accounts for the majority of prepaid phone plans.

Most MVNOs buy access to only one network, and they are often deprioritized on that network. The exception is WIRED's top pick, US Mobile, which buys access to all three major carrier networks in the United States and can switch among them. US Mobile also offers plans with priority (non-throttled access) to protect against that deprioritization.

This arrangement has grown increasingly complicated as the big cellular networks snap up many prepaid MVNO brands to reduce competition with their own services. T-Mobile owns Mint Mobile, Ultra Mobile, UScellular, and Assurance Wireless. AT&T owns Cricket Wireless. Verizon owns Visible Mobile, plus a number of brands operating under the TracFone umbrella. These include Total Wireless, Straight Talk, and Simple Wireless.

Are Prepaid Phone Plans Slower Than Postpaid Plans?

Sometimes, though often much less so than you would expect, and other times, not slower at all. Customers of the major cellular network operators often receive priority over prepaid users who bought service from a third-party MVNO.

That’s not universally true, though. Verizon’s Visible prepaid service, for example, promises to deliver network speeds virtually identical to Verizon’s subscription plans. Different MVNOs negotiate their own terms for their prepaid plans. Put more simply, mobile data rates available from prepaid cellular services are usually more than adequate for even heavy users—if you choose a top-rated service provider.

Are Prepaid Phone Services Reliable?

Prepaid phone services are usually as reliable as other types of service, as they use the same cellular network infrastructure. But there can be some situations where prepaid service is less reliable.

Prepaid plans are less likely to include domestic roaming. If your plan doesn’t have domestic roaming, your phone won’t be able to switch to an out-of-network cellular signal when you are out of the coverage area your service provides. That’s rarely a problem in urban and suburban areas because all mobile cellular networks have broad coverage in heavily populated locales, but a lack of roaming can lead to gaps in coverage in more rural areas.

Some prepaid providers, like US Mobile, get around this by offering service on multiple networks and the option to switch between them.

Can I Port Phone Numbers to and From a Prepaid Service?

Yes, you can port a number to or from a prepaid cellular service. The exact details can vary from one service to the next, but it’s usually a quick process—especially if you have a device with an eSIM, which is what many modern mobile phones use.

What Happens if I Leave a Prepaid Phone Plan?

You pay for prepaid service before you use it, so if you choose to leave at any time, the service provider is less concerned. You’ve already paid them for the service, after all. But there's a bit of a delicate dance: You generally want to switch services just a few days before your current service period ends. This will protect you from paying for multiple services simultaneously, while still granting a grace period to ensure you can successfully port your phone number.

How WIRED Tests Prepaid Cellular Services

This guide is informed by the personal experience of multiple WIRED reviewers who have used prepaid cellular services as their primary mobile service for years. I signed up for prepaid cellular services that WIRED staffers and contributors hadn’t previously used, such as US Mobile and Helium. I tested their services on an iPhone 16 Pro, which supports multiple eSIM connections. I was able to simply switch between services within seconds to see how various options differ.

While the reliability and speed of service were important, I also paid attention to the ease of signing up for a service and the level of features available. I prefer services that offer a wide range of features, including hot-spot support and some form of international calling, over those that exclude such extras (so long as the add-ons did not add much to the price).

Speaking of, price is a huge factor—perhaps the largest. Because prepaid cellular services generally rely on the same networks, the price to access the service deserves a lot of consideration.