Just make sure to turn off your cellular and data roaming so you don’t accidentally get stuck with charges. To do that on an iPhone, go to “Settings > Cellular” and click the switch next to “Cellular Data.” Also go to Cellular Data options and make sure “Roaming” is turned off. On most Android phones, go to “Settings > Mobile Networks > Data roaming access” and then click on “Deny data roaming access.”
Between traditional subscription plans on the big four carriers, prepaid services, and companies reselling those four networks, you have hundreds of options for family plans, but the two-line rates of Metro by T-Mobile and the four-line deals of Verizon’s prepaid service come out on top. These plans each use one of the top two networks, let you bring your own devices (the best way to save money while still getting a quality phone), and offer conveniences like the capability to use your phone as a mobile hotspot and roam overseas without paying painful-to-extortionate extra fees.
24-Mo. Installments: Req. 24-mo. installment agmt, 0% APR & qualifying device & svc. plan. Device pricing for well-qualified customers. Models with higher memory config. may req. a down pymt. Mo. pymt. terms & down pymt. for all others will vary. Down pymt., unfinanced portion & sales tax (on full purch. price) due at purch. Early termination of 24-Mo. Installments/Svc.: If you cancel wireless svc., remaining balance on device becomes due.
You can also purchase an international SIM card that can be used in many different countries. This is a good bet for multi-country trips or for travelers who travel regularly to many different regions around the world. However, the option of replacing the SIM card is only available on unlocked phones. Ask your phone company if your phone’s SIM card can be unlocked.
We have reviewed a selection of carriers including AT&T, Sprint, T-Mobile, Verizon Wireless, Boost Mobile, Virgin Mobile, Straight Talk, U.S. Cellular, TracFone, Tello, and more. Some phones are only available with certain carriers because the carriers produce some phone models themselves. But most carriers will serve a variety of manufacturers so in most cases you’ll have a wealth of choices with any given model.
We have reviewed a selection of carriers including AT&T, Sprint, T-Mobile, Verizon Wireless, Boost Mobile, Virgin Mobile, Straight Talk, U.S. Cellular, TracFone, Tello, and more. Some phones are only available with certain carriers because the carriers produce some phone models themselves. But most carriers will serve a variety of manufacturers so in most cases you’ll have a wealth of choices with any given model.

T-Mobile’s coverage has improved considerably over the past three years, and over the past two years, Sprint’s has progressed as well; we expect further improvements as the carriers upgrade their networks. Those two carriers should also be deploying more lower-frequency spectrum, either purchased or “refarmed” from older services, which ought to improve their problematic indoor reach.
AT&T’s prepaid service and Cricket Wireless offer comparable savings, as do T-Mobile’s in-house prepaid service and its Metro by T-Mobile subsidiary, but those networks aren’t as good as Verizon’s and their prepaid plans aren’t as good for world travelers. Sprint’s Boost Mobile and Virgin Mobile USA in-house brands are even worse for limiting the ability to bring your own phone.
24-Mo. Installments: Req. 24-mo. installment agmt, 0% APR & qualifying device & svc. plan. Device pricing for well-qualified customers. Models with higher memory config. may req. a down pymt. Mo. pymt. terms & down pymt. for all others will vary. Down pymt., unfinanced portion & sales tax (on full purch. price) due at purch. Early termination of 24-Mo. Installments/Svc.: If you cancel wireless svc., remaining balance on device becomes due.
AT&T's size, reputation, and brand recognizability also means they don't have to beat other carriers on price to stay competitive. AT&T's plans are among the most expensive on the market, though a recent overhaul of their unlimited offerings have made them a bit more reasonable. The main things you're paying for with AT&T are coverage, features (like hotspot allotments) and international options. 
AT&T: AT&T has a bundle of nice BOGO and rebate deals on name-brand Android and Apple flagships for DirecTV customers: Buy two iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, XS Max, Samsung Galaxy S9, Galaxy S9 Plus, Galaxy Note 9, or LG V35 ThinQ smartphones on AT&T Next and enjoy between $700 and $900 back in bill credits toward the value of the second phone (the rebate amount varies by model). If you don’t want to buy two and/or you’re not a DirecTV customer, then you can still get up to $600 back on a Galaxy S9, S9 Plus, or Note 9 with an eligible trade-in.
Verizon’s network is still better than T-Mobile’s, but that advantage is less pronounced for data. Automated drive testing by the research firm RootMetrics that rate T-Mobile poorly include lagging grades for voice and text use, while they show T-Mobile as a respectable third place for speed and data. PCMag currently ranks T-Mobile as a very close second to Verizon, while OpenSignal’s test results say that T-Mobile is now actually ahead of Verizon in speed and data. And though T-Mobile’s GSM-based network—which lets you talk and use data simultaneously, unlike Verizon’s—has historically leaned on higher-frequency bands that don’t reach as far inside buildings, that’s getting better. That GSM foundation also means that T-Mobile is compatible with more phones than Verizon is, including virtually every unlocked phone you can buy.
If saving money without compromising too much on data is the most important thing to you, Republic Wireless offers a decent amount of data for less than $30 a month, especially after tweaking what it charges for LTE data. Otherwise, Verizon offers the most compelling individual cellphone plan, costing $55 a month for 5GB; you can also roll over unused data to the next month. Metro by T-Mobile — the new name for the old MetroPCS service — still offers the best prepaid plans for both individuals and families thanks to a strong network and appealing perks.

Disclaimer: The information featured in this article is based on our best estimates of pricing, package details, contract stipulations, and service available at the time of writing. All information is subject to change. Pricing will vary based on various factors, including, but not limited to, the customer’s location, package chosen, added features and equipment, the purchaser’s credit score, etc. For the most accurate information, please ask your customer service representative. Clarify all fees and contract details before signing a contract or finalizing your purchase.
One of the key ways Sprint has been able to stay competitive in the U.S. mobile market is by pricing their plans very inexpensively. Take for example Sprint's Unlimited Freedom plan, just $50 for one line, or an incredible $100 for four lines. And this to say nothing of the carrier's $1 for a year of unlimited deal. No U.S. major is cheaper than Sprint. 

You can also purchase an international SIM card that can be used in many different countries. This is a good bet for multi-country trips or for travelers who travel regularly to many different regions around the world. However, the option of replacing the SIM card is only available on unlocked phones. Ask your phone company if your phone’s SIM card can be unlocked.

Sprint Unlimited Basic Plan: Includes unlimited domestic calling, texting, 500MB LTE MHS, VPN & P2P & data. MHS reduced to 3G speeds after 500MB/mo. Third-party content/downloads are add’l. charge. Plan not avail. for tablets or MBB devices. Select Int’l svcs are included for phone lines. See sprint.com/globalroaming. Subsidized devices incur an add'l. $25/mo. charge.
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