What Travel eSIMs Mean for Your Phone Bill Abroad

As of October 20, 2026, both AT&T's International Day Pass and Verizon's TravelPass are listed at $12 per day for most destinations, so a week abroad with the phone in use every day costs $84 for one line. On January 12, 2026 the FCC waived Verizon's 60-day handset unlocking requirement, and a locked phone cannot take a third-party travel eSIM. A cheaper route may exist, but confirm the phone is unlocked before you leave.

Key takeaways

AT&T charges $12 per 24-hour period of use; Verizon $12 per day of use plus taxes and fees. Many T-Mobile plans include some data abroad, with calls at $0.50 a minute.
A travel eSIM from another seller adds a second line for data, and the phone must be unlocked.
With a 5 GB, 7-day assumption, a $12 day pass works out to $16.80 per GB, against $3.00 per GB for an assumed $15 travel eSIM.
On AT&T, received texts on the home line carry no fee, but answering a call can add a $12 day.

What it means for you

Short trip, 3 to 5 days: a day pass costs $36 to $60 for one line at $12 a day, with no setup.
Long stay, 3+ weeks: AT&T caps fees per bill cycle; Verizon lists no cap but sells a monthly plan; see the day-pass section.
T-Mobile customers: check what your plan already includes.
Locked or financed phone: check unlocking first.
Need your US number for bank codes: see the pitfalls for what still costs money.

Day passes: listed prices

A day pass is a flat fee for each day you use your US plan abroad. The carrier pages state:

Carrier	Price or allowance	Conditions stated
AT&T International Day Pass	$12 per day for the first line; $6 for each extra line on the same account and calendar day; $20 per line at sea	Fee covers 24 hours from first use; data comes from your domestic allowance. At most 10 fees per line per monthly bill cycle in included destinations; no cap at sea. Consumer postpaid plans. Page dated March 2, 2026.
Verizon TravelPass	$12 per line per day in 210+ countries and destinations, plus taxes and fees; $6 in Canada and Mexico	Charged only on days used. 5 GB high-speed data per session, then 3G speeds. Qualifying plan required; Canada and Mexico roaming is included with Simplicity and Unlimited plans. No cap listed.
T-Mobile travel benefits	Experience Beyond 2.0: up to 15 GB high-speed data; Experience More 2.0: up to 5 GB, in 215+ countries and destinations; most customers get unlimited data at up to 256 kbps	Varies by plan. Calls, including over Wi-Fi, cost $0.50 a minute (Wi-Fi calls to the US, Mexico and Canada are free). US residents only; not for extended use. Passes are sold; no prices shown.

The T-Mobile terms come from its travel benefits page. Verizon's travel FAQs add that TravelPass stays on the line after you return, charging nothing until you next use the phone abroad.

For long stays, per AT&T's important details, 10 fees is $120 per line per monthly bill cycle. A 21-day trip within one cycle costs $120; split across two cycles, up to $240. On Verizon, with no cap listed, 21 days of TravelPass cost $252, though its FAQs list a $100 monthly plan for trips of 9 days or longer.

Travel eSIM or local SIM on arrival

An eSIM is a SIM built into the phone, loaded by download instead of a plastic card. Apple states that iPhone 14 models or later purchased in the United States can only be activated with an eSIM. Google says Pixel 10 and later (except the Pixel 10 Pro Fold) can only use an eSIM in the US. On those phones, a local line has to be an eSIM.

Travel eSIM, bought before you leave. Google suggests a prepaid eSIM from an international carrier, activated when you arrive, to avoid roaming charges. Apple lists providers with eSIM plans in over 190 countries and regions.
Local eSIM bought on arrival. Apple says setup needs Wi-Fi or a hotspot (some eSIM-only iPhones can skip this in some countries), you may need ID such as a passport, and many local plans include a local number.
Plastic local SIM. Only possible on phones that still have a tray, and the phone must be unlocked.

Plan terms differ by seller. As one example, not an endorsement, the Europe page of the seller Airalo lists 41 countries and networks and says to install with a stable internet connection. Its help center says that for most packages, validity starts when the eSIM connects to a supported network in its coverage area, but some start at installation. The package's "Validity Policy" says which.

Phone requirements and unlocking

Apple states that to use two carriers, your carrier must unlock your iPhone, or both plans must be from the same carrier. To check, open Settings > General > About: an unlocked iPhone shows "No SIM Restrictions" next to Carrier Lock.

Before the FCC's order DA 26-43, Verizon had to unlock phones automatically 60 days after activation, whether or not the customer asked or had paid off the phone; the order notes Verizon was the only nationwide operator under that rule. The waiver applies to handsets that became active on Verizon's network from January 13, 2026, so phones activated earlier are not covered.

For those newer phones, Verizon follows the CTIA Consumer Code. Postpaid phones are unlocked on request after the contract or financing plan is fulfilled, or an early termination fee is paid. Prepaid phones are unlocked no later than one year after activation. Within two business days of a request, Verizon must unlock an eligible phone or explain why not. A financed phone with payments left can mean no travel eSIM, leaving the day pass as the fallback.

The waiver lasts until the FCC decides on "an appropriate industry-wide approach for the unlocking of handsets." A search on October 20, 2026 found no such rule. For other carriers, read their own unlocking policy.

Setup and pitfalls abroad

Apple's page on using eSIM while traveling internationally describes the iPhone flow. With iOS 26 or later, when you arrive, tap "Turn On Travel eSIM" and choose "Travel eSIM Only" or "Travel eSIM and Current eSIM." To switch manually, go to Settings > Cellular > Cellular Data. With the travel eSIM alone, FaceTime and iMessage keep working on your home number.

On a Pixel, Google says to open Settings > Network & internet > SIMs and, under "Your primary SIMs," choose a SIM for Calls, Texts or Mobile data.

Apple's page on cellular data roaming options gives the steps: Settings > Cellular, tap the number to change, then Cellular Data Options, and turn Data Roaming off. AT&T advises turning off data roaming and Wi-Fi calling to avoid triggering its fee unintentionally.

Pitfalls to plan around

The home line can still trigger a fee. Apple warns that with both lines on, the home line "might still incur roaming fees." Data Roaming off stops data only. AT&T charges the daily fee the first time you use data, make or receive a call, or send a text; received texts don't trigger it. Verizon lists making or receiving a call, sending texts or using data.
No number on a data-only plan. SMS bank codes go to the home line, which has to stay on.

Worked example: a 7-day trip

Illustrative example: one phone, seven days abroad, 5 GB of data. The day pass is the listed $12, before Verizon's taxes and fees. The travel eSIM price of $15 for 5 GB over 7 days is an assumption, not a seller's quote.

Day pass:    $12 x 7 = $84    -> $84 / 7 = $12.00 per day;  $84 / 5 = $16.80 per GB
Travel eSIM: $15 (assumed)    -> $15 / 7 = $2.14 per day;   $15 / 5 = $3.00 per GB
Difference:  $84 - $15 = $69  (the eSIM costs about 82% less)

Home line answers calls on 2 days, pass on:
Travel eSIM + 2 fees = $15 + $24 = $39 -> still $45 less than $84

At $30 for the same 5 GB, the eSIM costs $4.29 per day and $6.00 per GB, and still saves $54. For reference, Airalo's Europe page showed a 7-day package labeled unlimited data at €25.00 on October 20, 2026. The day pass wins on cost only if the travel plan costs more than $84, or if you use the phone abroad on very few days: one $12 day beats a $15 plan, and two days ($24) beat a $30 one. It also wins on convenience: no unlock check and no download. A T-Mobile plan with enough included high-speed data may cost nothing extra.

To run your own numbers, use the Cost per Unit and per Use calculator.

Frequently asked questions

Can a phone run two eSIMs at the same time?

Apple says iPhone 13 models and later support Dual SIM with two eSIMs. Google says a Pixel 7 or later can run two eSIM profiles if the carrier allows it. Only one line carries data at a time.

Does a travel eSIM replace my day pass?

Not automatically. AT&T's pass stays on the line until you remove it, and AT&T adds it automatically when you first use the phone abroad, unless you opt out. Verizon's TravelPass stays on after you return. Without a pass, AT&T applies pay-per-use rates and Verizon charges Pay as You Go rates. Either way, the travel eSIM only saves money if calls on the home line stay few.

How much is a second line on AT&T's day pass?

AT&T lists $6 per day for each extra line on the same account and calendar day, on top of $12 for the first line. For two lines over 7 days that is $18 x 7 = $126, or $63 per phone. At sea, every line pays $20.

When does a Verizon TravelPass charge show up?

Verizon says international travel charges can take up to 60 days to appear on the bill. It blocks international data once unbilled usage reaches $500, and you call a listed number while abroad to lift the block.

What happens to the travel eSIM when I fly home?

Apple says that with iOS 26 or later the iPhone automatically turns off the travel eSIM and turns the home SIM back on, depending on country or region. If not, go to Settings > Cellular, make sure "Turn On this Line" is enabled for your primary line, and turn off travel lines you no longer use.

Checklist before you fly

Check Carrier Lock in your phone's settings, or ask your carrier to unlock it, well before you leave.
Price the day pass for every line, or your plan's included data, against a travel plan covering every country on your route.
Install the travel eSIM on Wi-Fi and note when its validity starts.
Set the home line for calls and texts and the travel line for data, and turn off Data Roaming and Wi-Fi calling on the home line.
After the trip, confirm the travel line is off and the home line is on.