Prices in pounds · Three prices checked 6 November 2026
Three roaming in the USA vs a travel eSIM
In the USA, Three uses its Go Roam Around the World prices. Here is what that costs for a long weekend, a week and a fortnight, next to a data-only travel eSIM for the same trip.
Photo: Bernd Dittrich on Unsplash
Three vs eSIM in the USA: 3, 7 and 14 days
Three’s lowest published option in the USA for each trip length, next to a Graba SIM USA plan with about 0.7 GB a day.
- 3 days
- 7 days
- 14 days
Three roamingGraba SIM eSIM
| Trip | Three | Graba SIM eSIM | Difference |
|---|---|---|---|
| A long weekend3 days | £12.503-day pass | £4.495GB, 30 days | The eSIM is £8.01 less |
| A week7 days | £30.007-day pass | £4.495GB, 30 days | The eSIM is £25.51 less |
| A fortnight14 days | £60.0014-day pass | £13.4915GB, 30 days | The eSIM is £46.51 less |
What’s included: Three: your UK calls, texts and up to 12 GB of your UK data. Graba SIM: data only, prepaid; your Three SIM stays in your phone for calls and texts. Graba SIM prices are live; Three prices checked 6 November 2026.
Sources: Three roaming (checked 6 November 2026). Prices change; check before you buy.
Graba SIM USA plans: data, validity and total price
The 15GB plan costs much more than the smaller sizes here. At about 0.7 GB a day, most week-long trips need around 5 GB.
Each plan is a one-off price for one eSIM. It starts when it first connects in the USA, and hotspot use comes out of the same data.
Using your phone in the USA
- JFK New York JFK
- EWR Newark
- MCO Orlando
- MIA Miami
- LAX Los Angeles
- New York City
- Strong signal across Manhattan and the other boroughs, and at most subway stations.
- Orlando and Florida
- Theme park apps for queues, maps and food orders use data all day. Allow about 1 GB a day.
- California road trips
- Highway 1 through Big Sur has long stretches with no signal at all. Save offline maps first.
- Las Vegas and the desert
- Good on the Strip. Roads to the Grand Canyon and Death Valley have big gaps.
- National parks
- Yellowstone, Yosemite and Zion have little or no signal away from visitor centres and lodges.
Networks our USA plans use: VerizonAT&T
- The plan gives you data, not a US phone number. Keep your UK SIM switched on for bank codes, and call with WhatsApp or FaceTime.
- Most visitors use 1 to 2 GB a day for maps, rideshare apps and messaging, so a 30-day plan covers a two-week trip with room to spare.
Going further with Three
- Canada (Niagara Falls and Vancouver to Seattle trips): Three charges £8 a day (Go Roam Around the World Extra).
- Mexico (side trips to Cancún or Tijuana): Three charges £8 a day (Go Roam Around the World Extra).
- Bahamas (cruises from Miami and Port Canaveral): Three charges £8 a day (Go Roam Around the World Extra).
What you get for the money
Three Go Roam Around the World
- £8 a day if you joined or upgraded on or after 18 December 2025; £5 a day if you joined between October 2021 and December 2025.
- Unlocks your UK calls, texts and up to 12 GB of your UK data a month.
- Three only charges on days you use your phone, but your Spend Cap has to be high enough to cover the daily charge or pass, or roaming can stop.
Graba SIM USA eSIM
- 4 plan sizes for the USA, from 1GB, 7 days to 20GB, 30 days, each a one-off price.
- Runs on Verizon, AT&T in the USA, with 5G where the network offers it.
- Data only. Your Three SIM stays on for calls and texts, so bank codes still reach you in the USA.
Three in the USA: questions
How much does Three roaming cost in the USA?
£8 a day in Go Roam Around the World (£5 on plans from 2021 to 2025), or £30 for a 7-day pass. Unlocks your UK calls, texts and up to 12 GB of your UK data. For a trip, that is 3 days: £12.50 (3-day pass); 7 days: £30.00 (7-day pass); 14 days: £60.00 (14-day pass).
Is a travel eSIM cheaper than Three in the USA?
It depends on the trip. Comparing Three’s lowest published option with a Graba SIM plan of about 0.7 GB a day: 3 days, the eSIM is £8.01 less; 7 days, the eSIM is £25.51 less; 14 days, the eSIM is £46.51 less. Three’s price also includes your UK calls, texts and up to 12 GB of your UK data.
Will a USA eSIM work in Canada or on a cruise?
A USA-only plan works on US networks only. If you cross into Canada or Mexico, check the plan’s coverage list or add a plan for that country. At sea, cruise ships use their own maritime networks, which travel eSIMs don’t cover and UK networks charge separately.
How much data do I need for two weeks in the USA?
Most people use 1 to 2 GB a day for maps, rideshare apps and messaging, so 10 to 20 GB covers a typical fortnight. Streaming video or sharing data with a laptop uses more.