Roaming day pass or a travel eSIM: how to choose

US postpaid passes from T-Mobile, Verizon and AT&T are one case. A prepaid data eSIM is another. EU and EEA roam like at home is a third case, and it still skips the UK, Switzerland and Turkey. The dollar figures below come from those carrier pages, checked on 21 October 2026. They are not sim.do prices.

A day pass extends the line you already pay for. The carrier keeps the number, and talk, texts and pass data are billed on that account. You do not get a second phone number. If the trip leaves the pass country list, the pass does not cover the missing country. Treat a connection or a port as its own stop on that list.

On the T-Mobile International Pass page, checked on 21 October 2026, the published passes are 1 day with 2 GB for $10, 10 days with 15 GB for $50, and 30 days with 30 GB for $75. The page lists 215+ destinations. A qualifying plan is required. The page says hotspot use of the pass data is allowed. One pass can be active at a time. Use those bundle prices as published. A country outside the 215+ destinations is not covered.

On the Verizon TravelPass page, checked on 21 October 2026, the fee is $12 a day in 210+ destinations and $6 a day in Canada and Mexico. Talk and text are included. High-speed data is 5 GB, then speeds are slower. Some Unlimited plans already include Canada and Mexico, so check your own plan before you add a $6 day. Multiply the fee by the days you will actually use the phone. Seven days at $12 is 7 times $12, which is $84. Canada and Mexico use $6 in that same count.

On the AT&T International Day Pass page, checked on 21 October 2026, land use is $12 a day in 210+ destinations. An added line on the same day is $6. Cruise use is a different offer at $20 a day, with a smaller high-speed allowance. Keep land and cruise as separate prices. Multiply $12 by the land days you will actually use the phone, add $6 for each added line on that day, and price each cruise day at $20.

A sim.do plan is prepaid data with no contract, no phone number, no voice and no SMS. It does not extend your carrier line. Calls and texts stay on the home line. If you need your usual number, keep that line and decide whether data stays on it. The dual SIM with eSIM guide shows how to run both lines. If the phone cannot keep the home line, the pass is what extends the line you already use.

Use the same countries and the days you will actually use the phone. You then have two bills for two products. Verizon includes talk and text with TravelPass. A sim.do plan is data only.

Size maps, chat and a hotspot with how much data for a trip. The T-Mobile page allows hotspot use of the pass data. Read Verizon and AT&T for their own tethering rules.

Roam like at home is the European Commission rule for periodic travel on a mobile contract you already hold. It covers the 27 EU countries, plus Iceland, Liechtenstein and Norway. Since 1 January 2026 it also covers Ukraine and Moldova. The Commission publishes the policy on its roaming page, checked on 21 October 2026.

The UK, Switzerland and Turkey sit outside that rule. London, Geneva and Istanbul leave it even when the rest of the trip is inside the EU. A contract can still add one of those countries, separate from the Commission map. If you roam in another covered country more than you use the phone at home over 4 months, the operator may apply a surcharge. Any data cap belongs in your contract. Roam like at home is not a US day pass and not a sim.do price. Which prepaid lists name Switzerland, the UK and Turkey is in Europe eSIM countries.

This article does not state a UK carrier price. A UK contract may include some EU destinations, and it may leave them out. The contract is the source, including for Switzerland and Turkey. A US pass price does not transfer onto a UK bill. Where a country is left out, keep the home line for calls and SMS and compare a prepaid plan for that gap.