The United States is one of the most expensive places in the world to roam on a European phone plan. A travel eSIM for the USA is the simple fix: a second, data-only line you install before you fly and switch on once you are there — maps, rideshare, messages home. It bills against its own allowance rather than your home operator's international rates.
This guide covers how a USA eSIM works, what it costs, how much data to buy, and how to set it up in minutes.
Why you need an eSIM for the USA
For visitors from Europe, US roaming is brutal: many home tariffs charge a daily "travel pass" of several euros, and older plans can bill eye-watering per-megabyte rates. A two- or three-week trip is exactly where those charges pile up.
A travel eSIM avoids the whole problem. Your home SIM stays in the phone for calls and texts on your usual number; the eSIM carries the data on a major US network at a fixed price you see before you buy.
eSIM USA: prices and plans
Plans are data-only and pay-as-you-go — no contract, no auto-renewal. Pick a data size and a validity window, pay once, done. Sizes run from small day plans up to larger multi-gigabyte plans for longer road trips, and you can top up from your phone if you run low.
Prices start at a few euros. The live price is shown on the USA eSIM page, and the plan card at the foot of this guide shows the current "from" price.
Coverage and speed
Horizon's USA plans run on a major nationwide network. Where that operator offers 5G you may get it, and coverage and speed depend on local network conditions across the big cities and the interstate routes in between. Hotspot and tethering are supported where the selected plan and your device allow it, which is handy for a laptop on a work trip or sharing with family.
How much data do you need?
For a typical one-to-three-week trip:
- Light (maps, messaging, the odd call): 3–5 GB.
- Normal (rideshare, photos, video calls home, some scrolling): 8–12 GB.
- Heavy (hotspot, road-trip navigation all day, streaming): 15 GB or more.
Start modest if you're unsure — topping up takes a minute. See how much data you need for a breakdown by activity.
Set up your USA eSIM in three steps
Do it on Wi-Fi at home before you travel:
- Buy and install the USA eSIM — you'll get a QR code by email. Scan it to add the data line (check your phone is eSIM-compatible first).
- Leave it switched off until you arrive — on these plans the clock can start as soon as the eSIM first connects to a US network, so check the plan details before installing early.
- Turn on the data line when you land and set it as your mobile data. Keep your home SIM on "calls and texts only" so nothing roams in the background.
The full walkthrough is in how to install an eSIM.
Frequently asked questions
Which eSIM is best for the USA? The one that matches your trip length and data habits. A single-country USA eSIM is simpler than a global plan when the US is your only stop, and it keeps your own number in place.
Does an eSIM work in the USA? Yes — modern iPhones and most recent Android flagships support eSIM, and US networks carry the data. Check the supported devices list if you're unsure about your phone.
Do I keep my phone number? Yes. The eSIM is a separate data line; your home SIM stays in the phone for your usual number, calls and SMS.
Can I use it as a hotspot? Yes, where the selected plan and your device allow it — you can share the connection with a laptop, tablet or another phone.
The short version
US roaming is expensive, so buy a USA eSIM before you fly, install it on Wi-Fi, and switch it on when you land. You keep your number and pay a few euros for the data you need. New to eSIMs? Start with what is an eSIM, then grab your USA plan.
