Best Travel Phone Plans in March: How to Choose and What to Consider

While T-Mobile has long included even slow international data in its plans, AT&T and Verizon largely haven't. For most plans, adding this functionality will cost extra. The good news is that both have gotten a lot better on roaming rates that, depending on your trip, it could make sense to do this rather than going through the process of unlocking, finding a local SIM card and playing that game (we'll get to this more in a moment). 

In the past, roaming was charged on a per-megabyte or -gigabyte used system, which could quickly lead to bills worth hundreds of dollars (or more). Today, both Verizon and AT&T allow you to roam with unlimited talk, text and high-speed data for $10 per day on many of their respective unlimited plans.

If you're traveling with a family plan, AT&T will only charge that $10 to one of the lines with other members being billed at $5 per day -- and it'll only bill you for 10 days, per line per billing cycle. So if you have one line with AT&T and are traveling for two weeks, you could only end up paying $100 instead of $140 for international roaming (though if your AT&T bill resets during that window, you'd be on the hook for those days since the clock starts each billing cycle).

Verizon doesn't cap the number of days it will charge you, but it does offer a couple of different options. One is its TravelPass perk, something that is offered as part of its latest unlimited plans. With this, you can get three days of international roaming for $10 per month. If you don't use those days, you could roll them over (and bank up to 36 of them). You can similarly add it for the month you're traveling, save a little there and then get rid of the perk for all the other months you wouldn't be using it. 

Verizon also offers a $100 monthly plan option that lets you get unlimited texts and data as well as 250 minutes for traditional calling (as opposed to using a messaging app like WhatsApp or FaceTime). Of the data, 20GB will be at "high speed" and the rest at "3G speeds." Note that with this plan you will need to remove it manually or else risk it being a recurring charge on your bill every month.

T-Mobile similarly offers the option to buy high-speed data "international passes." It has a few options here, including a 15GB of high-speed data option (to be used "up to 30 days") running $50 for the month.

The big reason we're focusing on roaming is because one of the most common ways US consumers still buy their phones is through wireless carriers and installment plans. To keep people from taking advantage of subsidized phones and then leaving for other providers, the carriers "lock" their phones to their networks until you finish the 24- or 36-month installment plans. 

Each carrier has different policies on when they unlock. Verizon's is the best and it will automatically unlock your phone after 60 days. T-Mobile will automatically unlock phones after their installment plans are paid off, which normally is two years at the carrier. AT&T is the worst: Like Verizon, its installment plans are 36 months and even after that period you will still need to actually reach out to the carrier to have it unlock your device. We covered all of this here. 

You could pay off the balance owed on your device to get your carrier to unlock it sooner, but doing so would forfeit the bill credits and the deal you likely got when you upgraded or switched. For example, if you purchased an iPhone 14 at AT&T last year and took advantage of its trade-in deal, paying off that phone early to unlock it would require you to shell out hundreds of dollars now and give up the deal you were given. And then you would still need to go out and get international service on top of that while still keeping your local service for when you return home. 

Depending on your situation this could make sense. If, for instance, you're traveling abroad for a couple of months and only have a month or two left on your installment plan, paying the $50 or so to your carrier to unlock your phone early so you can get a cheaper phone plan while away could make sense. But you'll want to check what you owe by heading into your account on your carrier's website and do the math before rushing to pay everything down and unlocking.

If you have an unlocked device, looking at a local SIM card could be much cheaper. eSIM options, which allow you to virtually add a SIM card to your phone, mean you could load up a local provider's SIM card into your phone through apps like Airalo or Ubigi before you even leave home, so you'll be good to go once you reach your destination. 

While Apple has made eSIM more commonplace after ditching the physical SIM card slot in US iPhones with the iPhone 14 line, it has actually included the technology in iPhones dating back to 2018's iPhone XS and XR devices. A number of Samsung, Google and other Android phones have also long supported eSIMs as well.