Best eSIM for the USA (2026)
Checked 2026-06.
As of June 2026, the simplest way to get mobile data in the USA without paying carrier roaming is a travel eSIM you install before you fly. For most visitors Saily is the value pick — it routes over T-Mobile and AT&T for broader fallback coverage and has cheap pay-per-GB tiers — with Airalo a close, well-supported alternative.
Saily's USA eSIM connects to both T-Mobile and AT&T, so you get a second network to fall back on where one runs thin — a real advantage in a country where coverage varies a lot outside cities. Its tiered plans also start cheaper (from ~$4 for 1GB), making it easy to size to a short trip.
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| Option | Data | Validity | Price | Notes |
|---|---|---|---|---|
| Saily (our USA pick) | 1 GB / 3 GB / 5 GB / 10 GB / 20 GB, plus 'unlimited' (~5 GB/day cap) | 7-30 days (unlimited up to ~30) | from ~$4 (1GB); ~$9 for 3GB; ~$14 for 5GB; ~$23 for 10GB | Runs on T-Mobile + AT&T — best fallback coverage. Data-only, no SMS/calls. Promo codes sometimes available. Checked 2026-06. |
| Airalo | 1 GB to 50 GB tiers, plus 'unlimited' (~3 GB/day cap then 1 Mbps) | 3-30 days (unlimited up to ~40) | from ~$4 (1GB); ~$8.50 for 3GB; ~$12.50 for 5GB; ~$21.50 for 10GB | Mainly T-Mobile (Verizon on some plans). Big, well-supported app; some plan variants add calls/texts. Checked 2026-06. |
| Carrier roaming day-pass | Uses your home plan's allowance | Per day of use | ~$10-15 per day (e.g. AT&T ~$12, Verizon ~$10) | Keeps your number and SMS, zero setup — but adds up fast on longer trips. Reference, not an affiliate. |
| Local US prepaid SIM/eSIM | Multi-GB to truly unlimited | 30 days+ | ~$30-50/month typical | Best for long stays; may need US ID/address and in-store setup. Overkill for a short trip. |
The USA is a big, unevenly-covered country, so the network behind your eSIM matters more here than in most destinations. Saily routes over T-Mobile and AT&T, while Airalo runs mainly on T-Mobile (with Verizon on some plan variants). Cities and suburbs are well served by all of them; the difference shows up on highways, in national parks and in rural areas, where having a second carrier to fall back on is the safer bet. If your trip is mostly urban, either provider will be fine.
Activating is the same drill for both: buy and install the eSIM before you fly (you need an eSIM-capable, carrier-unlocked phone — most iPhones from XS onward and recent Pixel/Samsung models qualify). Install it on home Wi-Fi, then leave it switched off until you land — the validity clock typically starts when the eSIM connects to a US network, not at purchase. On arrival, toggle it on, enable data roaming for that line, and you should connect within a minute or two.
For data sizing, plan on roughly 0.3-0.5 GB per day for maps, messaging, ride-hailing and light browsing — so a 3-5 GB plan comfortably covers a one-to-two-week trip of normal use. If you stream video, hotspot a laptop, or upload a lot of photos and video, budget 1-2 GB per day and look at a 10-20 GB plan or an 'unlimited' (daily-cap) plan instead. Both providers sell 'unlimited' tiers, but read the fine print: they cap full-speed data per day (around 5 GB) and then throttle, so they're really 'lots, then slow' rather than truly unlimited.
On validity, fixed-data plans generally run 7-30 days, with longer 'unlimited' windows up to ~30-40 days; pick a window that covers your whole stay with a little slack, since you can't pause it once it starts. The big USA-specific gotcha is voice and SMS: these travel eSIMs are data-only — no US phone number, and no normal calls or texts. That's fine for most travelers because WhatsApp, FaceTime, Signal and similar apps work over the data connection, but if you specifically need to receive SMS one-time-passcodes from a US service or take regular voice calls, keep your home SIM active for those (and watch its roaming charges) or choose an Airalo plan variant that bundles calls and texts.
Either way, a travel eSIM beats carrier roaming on price. International day-pass roaming in the US typically runs about $10-15 per day, so a two-week trip can hit $100+ — versus roughly $4-37 total for a comparable eSIM data plan. Prices and tiers change, so use the live links below to check the current plans before buying.
For your exact trip, run the eSIM vs roaming cost calculator (your destination, days and data, ranked by total cost).
FAQ
Does an eSIM work in the USA?
Yes. US networks (T-Mobile, AT&T, Verizon) fully support eSIM, and travel providers like Saily and Airalo resell capacity on them. You just need an eSIM-capable, unlocked phone — most iPhones from the XS generation and recent Pixel/Samsung devices qualify.
How much data do I need for a trip to the USA?
For maps, messaging and ride-hailing, about 0.3-0.5 GB per day is plenty, so 3-5 GB covers most one-to-two-week trips. If you stream video or hotspot a laptop, plan on 1-2 GB per day and choose a 10-20 GB or daily-cap 'unlimited' plan.
Can I keep my phone number with a travel eSIM?
You keep your number on your existing SIM/eSIM for calls and texts, but the travel eSIM itself is data-only with no US number. Most people leave their home line on for SMS while using the eSIM for data, and make calls over WhatsApp, FaceTime or Signal.
Should I buy the eSIM before I arrive or after?
Buy and install it before you fly, on home Wi-Fi, but leave it switched off until you land. The validity period usually starts when the eSIM first connects to a US network, so installing early costs you nothing and means you're online the moment you arrive.