eSIM for the United States
Updated 2026-08-22
Networks and coverage
AT&T and T-Mobile are the networks travel eSIMs most often use, and both have solid 4G and 5G coverage in cities, along interstates and in the suburbs.
The country is large and thinly populated in places. National parks such as Yellowstone, Zion and Death Valley often have no coverage at all, and stretches through Nevada and Utah can run for hours without a signal.
How much data do you need?
For two weeks of maps, navigation and ordinary use, 10 GB suits most people. Navigation uses more than expected when it runs all day in the car.
Tethering a laptop, or streaming in the hotel room rather than using their wifi, burns through it much faster. Then 20 GB is the more realistic level.
Practicalities on arrival
Switch the line on right after landing and turn data off on your Swedish subscription. American roaming from Sweden is among the most expensive there is, and a few minutes of background sync is enough to show up.
Download offline maps for the routes you will drive. An eSIM gives you data, not coverage, and in the desert there is none to give.
Common questions
- Do I get an American phone number?
- No. A travel eSIM is data without a number. To call American numbers, use a service like WhatsApp, or your Swedish number at Swedish call rates.
- When does validity start counting?
- When the eSIM first connects to a network at your destination, not when you buy or install it. You can prepare well in advance without losing days.
- Can I make calls with the eSIM?
- No, it is data only. Call over WhatsApp, Messenger or FaceTime, or keep your Swedish number active for ordinary calls.