How do Phone Plans Work?

When shopping for a phone plan, you have a bunch of details and choices to sort through, and it helps to know how a cell phone plan works before you make any decisions.  

How does a cell phone plan work?

When you get a phone plan, you are buying access to use a mobile carrier’s network to call, text and potentially use mobile data for a set amount of time.

Cell phone plans have three main components:

• Talk & text: This lets you make and receive calls, send and receive text messages, and usually includes voicemail. Many phone plans offer unlimited talk & text, but there are some budget options where you can pay for a set number of talk minutes and text messages per billing cycle. Simple plans called talk & text only, or no-data plans, include this service and very little or nothing else.
• Data: Most plans also include cellular data, which lets you use the internet when away from Wi-Fi (not being tied down to Wi-Fi is why it's also called mobile data). You'll find plenty of unlimited data plans advertised, but be aware that "unlimited" typically has some limits.
• Extras and perks: Carriers may let you finance a phone over time and often offer perks like discounts on phones, free subscriptions or cloud storage. (But use a phone bill calculator to compare costs of accepting a carrier's phone deal versus buying your own phone.)

When you select a phone plan, you choose how much of these components you want and then balance that against how much you want to pay. You'll get a physical SIM card or a code to activate an eSIM. The SIM is what identifies your phone and the plan you’re on to carriers so they’ll grant access to the services you pay for.

The same applies when you switch cell phone carriers. You'll need to activate a SIM with the new service.

Types of cell phone plans

The two basic types of phone plans are postpaid, where you use services and then pay at the end of the billing cycle, and prepaid, where you pay up front and get service for a set time. Each has implications for your budget, credit, and the services and perks to expect. 

Beyond the types of phone plans based on method of payment, cell phone plans can further be broken down into:

• Family phone plans
• Phone plans for kids and teens
• International phone plans
• Senior phone plans
• Business phone plans

How do postpaid phone plans work?  

A postpaid phone plan is a contract you enter for a specific length of time, often 24 or 36 months. You agree to pay, and the carrier agrees to provide access and services. Here’s how it works:  

1. You select a plan that fits your needs, considering talk/text and data use, network coverage, speeds, and price.
2. The carrier you choose typically will check your credit to see how likely you are to pay as agreed. It may also offer discounts and financing for a new phone, with payments over time, or even a free phone for signing up.  
3. If approved, you will be sent a SIM card to activate (either physical or via an email/link for an eSIM).
4. You activate the SIM for the new service.  
5. The carrier bills you at the end of the month for your plan cost plus any extras you used (such extra data or data roaming when traveling abroad). Keep an eye on what's on your phone bill so you can understand whether you're overpaying for what you use.  
6. When the contract is over, you decide whether to continue or switch carriers. You might also have opportunities to exit early. Other carriers might try to win your business by covering the cost of breaking your contract, for example.  

Pros and cons of a postpaid phone plans

How do prepaid phone plans work? 

A prepaid phone plan is a phone plan that gives you service after you pay for it upfront. With prepaid phone plans, you don’t have a contract, as the service is only given once paid, reducing a provider's inherent risk with customers who may not be able to pay down the line like in a traditional, postpaid plan. That means there’s no credit check, either, because you’re not entering into a contract that requires paying over time. Here’s how it works:  

1. You select a prepaid service and sign up, then pay for the service period you chose. Many plans are month-to-month but offer a discount if you prepay for a longer period; other plans require a three-month or longer commitment. The Big 3 carriers (AT&T, T-Mobile, Verizon) offer prepaid plans, but the best deals are found with MVNO phone plans.
2. Once the sign-up is completed, you will be sent a SIM card to activate, whether physical or through an email/link as an eSIM.
3. You activate the SIM for the new service. 
4. You use the service period you paid for, then decide after the paid service ends whether to continue or switch carriers. Note: Many prepaid phone plans implement auto-renewal (or offer a discount for it), so if you're looking to avoid insufficient funds fees from your bank, ensure the auto-renewal is turned off.

Pros and cons of a prepaid phone plans

How do family phone plans work?  

Family plans or group plans are essentially multi-line discounts. A carrier may give you a lower per-line price when you sign up for several lines, or it might offer something like “fourth line free.” Family plans are more common with postpaid carriers, but you’ll find some from prepaid as well. 

When signing up, be sure to consider these factors:  

• How many lines you need and your budget: Not every plan will work — some are limited to a single line or just a few — and not every plan allowing multiple lines will offer a discount.   

• The fine print of the offer: You may lose the discounted price if you drop one of the lines, for example.  

• What each line gets: Does each line have its own data, or do they all share the same data limit? A common bucket of data to use can help you avoid extra charges if you have some light data users balancing out a data hog. Some carriers even let you pick a different plan for each line on a shared account so you can accommodate what each user needs, which can be handy when choosing phone plans for kids and teens. 

After signing up, these plans function the same way as others: Postpaid plans are billed at the end of the cycle, and you may be on the hook for surprise charges if someone uses extra services. Prepaid plans bill up front, so you’re safe from extra charges unless you choose to buy extras like a data top-up.  

>> Read more: Need fewer lines? See the best unlimited data plans for two lines.

How do international phone plans work?  

An international cell phone plan is a plan that allows you to use your phone's services, including calls, texts, and data in other countries.

An international phone plan works by partnering up with international networks to provide coverage while abroad. This can be done by one of two ways: By adding an international roaming plan to your existing plan in the U.S for travel, or by activating an international SIM card with a stand-alone international phone plan.

How to add international roaming/coverage to your plan

Quite a few domestic phone plans offer talk, text and sometimes data use in Canada and Mexico. If your travel typically keeps you in the U.S. and its close neighbors, one of these plans will cover your needs without extra cost. A few plans have an even broader footprint; for example, AT&T’s Unlimited Premium PL offers roaming in Canada, Mexico and 20 Latin American countries.  

If you're looking to travel beyond those destinations, look into your phone provider's rates for international roaming. It may be billed on a per day or per GB basis, or it may be an add-on that you have to specifically select to activate.

How to get an international SIM card to use while traveling 

If your phone is not locked to a specific carrier, an easy and economical option is to buy an international SIM card covering your destination. The increasing prevalence of dual-SIM and eSIM phones has made this a convenient approach. You simply choose the best international SIM for your situation, then activate the SIM when you arrive so you can use cellular networks in the country or region you’re visiting without paying extra to your existing provider.  

Keep in mind, most of these don’t include a local phone number. For calls, you’d need to use a virtual number like you’re provided with TextNow.  

How do senior cell phone plans work?

Senior cell phone plans offer discounts to those over an age threshold or sometimes via AARP membership. You don't necessarily have to be 65 or older. For example, AT&T offers an Unlimited 55+ plan and Consumer Cellular has an Unlimited for Ages 50+ plan.

Typically you will need to upload proof of age or present it in-store to qualify, or share your AARP member ID number.

Otherwise, they work the same way postpaid or prepaid phone plans work, with service that includes calls, texts, and some level of mobile data suited for different needs.

How do business cell phone plans work?

A business cell phone plan provides specific benefits (beyond just call, text, and data) for business use cases. These include solopreneurs who just need a single line or perhaps a second phone number, up through companies with several locations and dozens to thousands of employees. A business phone plan can be customized to fit the budget, number of users and complexity of features desired — whether that's a cellular plan or a Voice over Internet (VoIP) choice.

Frequently asked questions about phone plans