The best international phone plan for travelers depends on how often you leave the country and how much data you burn abroad. Frequent travelers usually save most with a home plan that already includes international data, occasional travelers do better with a carrier day pass for short trips, and anyone on a long trip or with an unlocked phone can often pay far less with a travel eSIM. This guide compares the main options for US-based travelers, with current prices and data limits taken from each provider’s own pages.
Choosing takes about 15 minutes. You need to know your current carrier and plan name, roughly how many days you’ll be abroad each year, and whether your phone is carrier-unlocked and eSIM-capable.
How International Phone Plans Work: The Three Main Options
Every option on this page falls into one of three categories, and the right one depends far more on your travel pattern than on the brand.
Plans with roaming built in. Some domestic plans include high-speed data in hundreds of destinations at no daily charge. T-Mobile’s Experience Beyond and Google Fi’s Unlimited Premium are the clearest examples. You land, turn on your phone, and it works.
Day passes. Verizon TravelPass and AT&T International Day Pass charge a flat fee for each day you use your phone abroad and let you use your home plan’s talk, text, and data. They are simple but add up fast on longer trips.
Travel eSIMs. Providers such as Airalo, Holafly, and Saily sell prepaid data packages you install as a second line. They are usually the cheapest per gigabyte, but they require an unlocked, eSIM-compatible phone and are primarily data plans.
Prerequisites Before You Pick a Plan
- An unlocked phone, if you want an eSIM. Airalo states that your phone must be both eSIM-compatible and carrier-unlocked. A device bought outright rather than through a carrier plan is usually unlocked, but confirm with your carrier.
- A qualifying plan, if you want a day pass. Verizon TravelPass requires a qualifying plan and a World device. AT&T’s unlimited day pass terms apply when the pass is added to an eligible Unlimited plan.
- An active line used at home first. US Mobile notes that its roaming won’t work if you activate the line outside the US, and a line must have domestic usage before roaming starts. Set up any new plan before you fly.
- Your trip length and data habits. Navigation and messaging use little data; video calls, uploads, and hotspot use for a laptop use a lot. Estimate this before comparing allowances.
Best International Phone Plans for Travelers Compared
The list below is ranked by overall value for a typical US traveler: how much high-speed data you get abroad, how predictable the cost is, and how little setup is required. Where a monthly plan price could not be confirmed on the provider’s own page, the pricing model is described instead of a figure.
1. Google Fi Unlimited Premium
Google Fi’s top plan includes 50 GB of high-speed data in more than 200 destinations, then continues at 256 kbps, with no daily pass to buy. It suits frequent travelers who want one plan that works at home and abroad without thinking about it. It ranks first because its included high-speed allowance abroad is the largest among the carrier plans compared here, and it reaches 5G in more than 110 of those destinations on compatible phones. It is a monthly plan; check Google Fi’s plan page for the current price.
- 50 GB high-speed data in 200+ destinations, then 256 kbps
- Cellular calls abroad at 20 cents per minute
- Free Wi-Fi calls to the US, Canada, and Mexico
- Free calls from the US to 50+ countries and territories
Weakness: Fi’s cheaper plans are far weaker abroad. Unlimited Standard covers only Canada and Mexico, and Unlimited Essentials includes no international data at all.
2. T-Mobile Experience Beyond
T-Mobile includes roaming in 215+ countries and destinations on its main unlimited plans. Experience Beyond (and the older Go5G Next) includes 15 GB of high-speed data abroad, while Experience More, Go5G Plus, and Magenta MAX include 5 GB; all then continue at up to 256 Kbps. It suits existing T-Mobile customers and frequent travelers who want texting and data abroad without a daily charge. Texts are free in those destinations, and Canada and Mexico usage is not charged.
- 15 GB high-speed roaming data on Experience Beyond
- Free texting in 215+ countries and destinations
- No charge for calls, texts, or data in Canada and Mexico
- Optional International Pass: 1-Day $10 (2 GB), 10-Day $50 (15 GB), 30-Day $75 (30 GB)
Weakness: calls outside North America cost $0.50 per minute on cellular, and the Essentials plan has no included roaming data, so you’d need a paid pass.
3. Verizon TravelPass
TravelPass lets Verizon customers use their domestic plan abroad for $12 per line per day in 210+ countries and destinations, or $6 per line per day in Canada and Mexico, plus taxes and fees. You’re charged only on days you use the phone abroad. It suits Verizon customers on short trips who want their normal number and plan to just work. TravelPass is added automatically to Unlimited Plus and Unlimited Welcome; otherwise you can add it by texting TRAVEL to 4004.
- Unlimited calls and texts using your home plan
- 5 GB high-speed data per session, then 3G speeds
- Only charged on days you use the phone abroad
- Canada and Mexico roaming included on Simplicity and Unlimited plans
Weakness: at $12 a day, a two-week trip costs well over $150 per line, which is more than most eSIM or built-in options.
4. AT&T International Day Pass
AT&T’s Day Pass costs $12 per day on land, with unlimited talk, text, and high-speed data when it’s added to an eligible Unlimited plan, in 210+ destinations. Each extra line used on the same day is $6. The 24-hour clock starts the first time you use data, text, or calls in a covered destination. It suits AT&T customers on short trips and cruise travelers, since a $20 cruise version covers 400+ ships with 500 MB of high-speed data per day.
- $12/day on land, $6/day per additional line
- Calls back to the US and between included destinations at no extra charge
- Multiple countries in one 24-hour period count as one fee
- Becomes free after 10 paid days in a bill cycle, per Best Phone Plans
Weakness: an accidental background data sync can trigger a full day’s charge, so turn off cellular data on days you don’t need it.
5. US Mobile
US Mobile includes native roaming on its Unlimited Premium plan: 20 GB of data, 200 minutes, and 250 texts abroad. The number of destinations depends on which network your line uses, ranging from 110+ to 180+. It suits budget-conscious travelers who want a cheaper prepaid carrier with roaming built in. Other lines can add a roaming add-on for $15 (1 GB, 150 minutes, 150 texts) or $30 (5 GB, 500 minutes, 500 texts).
- 20 GB roaming data on Unlimited Premium
- Roaming add-ons from $15
- Coverage of 110+ to 180+ destinations depending on network
- Data-only eSIM option in 100+ countries
Weakness: coverage varies by network, and roaming won’t work on a line activated outside the US, so set it up well before departure.
6. Airalo
Airalo sells prepaid eSIM data packages for 200+ countries and regions, with local, regional, and global options. You choose a package by data amount and validity, install it in the app, by QR code, or manually, and switch to the eSIM line when you land. It suits travelers with unlocked phones who want to pay only for the data they need. Packages are priced individually by destination, size, and validity, and Airalo’s own examples run from $5 upward.
- Local, regional, and global packages
- Install in-app, by QR code, or manually
- Keep your main SIM active for calls and texts
- Some plans activate on install, others on first network connection
Weakness: Airalo treats its eSIMs as data plans for most packages, so you’ll still rely on your home line or Wi-Fi calling for voice.
7. Holafly
Holafly sells unlimited-data eSIMs priced by the day, starting at $3.90 per day, with single-country plans up to $11.90 per day and regional plans up to $15.90 per day. A 30-day plan for many single countries, including Japan, the UK, and Italy, costs $74.90. It suits heavy data users who don’t want to track gigabytes. A monthly subscription is also available: $49.90 for 25 GB or $64.90 for unlimited.
- Unlimited data on daily-priced plans
- Europe regional plan covering 33 countries
- Monthly subscription options for frequent travelers
Weakness: hotspot sharing is capped at roughly 500 MB to 1 GB per day depending on plan and location, and fair-use policies can slow speeds after heavy use.
8. Saily
Saily offers both fixed-data and unlimited eSIM packages. Its 30-day unlimited plans are listed at $48.99 for destinations including Mexico, Japan, the UK, Italy, Canada, and Portugal, and 20 GB 30-day plans range from $24.99 for Japan to $45.99 for Mexico. It suits travelers who need hotspot use, since Saily states that every plan includes unrestricted hotspot sharing. These figures come from Saily’s own comparison article, so check its live pricing for your destination.
- Fixed-data and unlimited plans
- Unrestricted hotspot sharing on all plans
- Optional US phone number
Weakness: prices vary sharply by destination, and Saily doesn’t publish a total country count in the comparison it uses to market itself.
Day Pass vs. eSIM vs. Built-In Roaming: Which Costs Less
Most of the decision comes down to trip length. A $12 daily pass is reasonable for a three-day business trip but expensive for a month abroad, while an eSIM’s upfront price gets better value the longer you stay.
| Option | Example cost | Best for |
|---|---|---|
| Verizon TravelPass | $12/line/day ($6 in Canada and Mexico) | Short trips, keeping your number |
| AT&T International Day Pass | $12/day, $6 per extra line | Short trips, cruises |
| T-Mobile International Pass | $50 for 10 days (15 GB) | T-Mobile plans without enough roaming data |
| Holafly 30-day single country | $74.90 unlimited | Heavy data users |
| Saily 30-day unlimited | $48.99 (listed destinations) | Long trips with hotspot use |
Frequent travelers who leave the country several times a year usually come out ahead on a plan with roaming built in, such as Google Fi Unlimited Premium or T-Mobile Experience Beyond, because there’s no daily meter running. Occasional travelers on a carrier like Verizon or AT&T will often save by pairing their normal plan with a travel eSIM for data and turning off cellular data on the main line.
How to Set Up a Travel eSIM Before You Fly
- Check compatibility. Confirm your phone supports eSIM and is carrier-unlocked. Airalo notes most flagship phones made since 2018 support eSIM, but it varies by provider and region.
- Buy the package. Pick the destination, data amount, and validity that match your trip.
- Install on Wi-Fi. Install through the provider’s app, a QR code, or manual entry while connected to stable Wi-Fi, ideally at home before departure.
- Check the activation policy. Some plans start their validity at installation, others when they first connect at your destination. Install early only if the clock starts on arrival.
- Switch lines on arrival. Turn on the eSIM line, enable data roaming on it, and set it as your data line. Leave your home line’s data roaming off if you don’t want day-pass charges.
When it works, your phone shows a local network name on the eSIM line and loads pages over cellular data.
Troubleshooting Common International Phone Problems
No data after landing on an eSIM. The most common cause is data roaming left off for the eSIM line. Turn it on for that line specifically, and check that the eSIM, not your home SIM, is set as the cellular data line. If it still fails, select a supported network manually in settings.
An unexpected day pass charge. On AT&T, the 24-hour pass starts the first time you use data, text, or calls in a covered destination, so a background app sync or an incoming call can trigger it. Turn off cellular data on your home line or use airplane mode with Wi-Fi on days you don’t want to pay.
Very slow data after a few days. Most plans slow you down once high-speed data runs out: Verizon TravelPass drops to 3G speeds after 5 GB, and T-Mobile and Google Fi drop to 256 kbps. On unlimited eSIMs, fair-use policies can also slow speeds after heavy daily use.
Roaming not working on a new prepaid line. Some carriers, including US Mobile, require domestic usage on a line before roaming works. Activate and use the line in the US first.
Public Wi-Fi at hotels and airports is a useful backup, but it’s worth protecting. Our guide to the best VPN services covers options for securing connections on the road.
Common Mistakes Travelers Make
Assuming “unlimited” means full speed. Nearly every plan here has a high-speed allowance followed by slower speeds, and unlimited eSIMs can be throttled under fair-use rules.
Buying an eSIM for a locked phone is another costly error. Airalo requires a carrier-unlocked phone, so confirm the lock status with your carrier before buying.
Forgetting calls is a third. Most travel eSIMs are data plans. Plan to use Wi-Fi calling or apps like WhatsApp, or keep your home line active for important calls. Our roundup of the best travel apps includes messaging and navigation tools that work over data.
Finally, don’t use hotspot heavily on a plan that caps it. Holafly limits tethering to roughly 500 MB to 1 GB per day, which is not enough for a full laptop workday.
Frequently Asked Questions
What is the cheapest way to get phone data abroad?
For most trips longer than a few days, a prepaid travel eSIM is cheapest, provided your phone is unlocked and eSIM-capable. Daily carrier passes such as Verizon TravelPass and AT&T International Day Pass cost $12 per day, which adds up quickly. Frequent travelers may save more with a home plan that includes roaming.
Does an eSIM give me a phone number for calls?
Usually not. Most travel eSIMs, including Airalo packages, are data plans, so you keep your main line for calls and texts or use Wi-Fi calling and messaging apps. Some providers sell options with a number, such as Holafly’s Ultimate subscription and Saily’s optional US number.
Can I use my phone in Canada and Mexico without paying extra?
Often, yes. T-Mobile doesn’t charge for calls, texts, or data in Canada and Mexico on its plans, and Verizon includes Canada and Mexico roaming on Simplicity and Unlimited plans. Verizon’s TravelPass for those countries is $6 per day on plans without it.
How do I avoid surprise roaming charges?
Turn off data roaming on your home line before you land, then turn it on only for a travel eSIM line, if you use one. On carriers with day passes, any data, call, or text in a covered destination can start a daily charge, so airplane mode with Wi-Fi on is the safest default.
Is Google Fi good for international travel?
Its Unlimited Premium plan is one of the strongest options for frequent travelers, with 50 GB of high-speed data in 200+ destinations before slowing to 256 kbps. Fi’s Unlimited Standard plan covers only Canada and Mexico, and Unlimited Essentials has no international data, so the plan tier matters.
Choosing the Right Plan for Your Trips
Match the plan to how you travel. If you leave the country several times a year, a plan with roaming included, such as Google Fi Unlimited Premium or T-Mobile Experience Beyond, removes daily charges entirely. For a short trip on Verizon or AT&T, a day pass is the simplest way to keep your number working. For anything longer, an unlocked phone and a travel eSIM will usually cost the least.
Before you go, check your phone’s lock status and install any eSIM on Wi-Fi at home. If you need a new phone for the trip, our guides to the best phone plans for one person and smartphone deals in Stockholm can help with the purchase.
