For most visitors on a short US trip, a tourist data-only eSIM starting at £2.59 is the better choice, while AT&T prepaid makes more sense if you are staying for weeks and genuinely need a US phone number for calls and texts. Both connect you to a major American network. The real difference is what you get, how much friction there is to set it up, and whether you need a US number at all. This guide gives you an honest head-to-head so you can pick the right one before you fly.
The Short Answer
- Short trip (a few days to two weeks), you mainly need maps, WhatsApp, rideshare, and email: get a tourist US eSIM. It installs in minutes, needs no ID or store visit, and costs less for the amount of data a traveller actually uses.
- Longer stay (a month or more), or you need a real US number to receive SMS codes, take local calls, or hand out a number: an AT&T prepaid SIM (or a similar network prepaid plan) is worth the extra setup.
Everything below explains why, and where each option quietly trips people up.
What AT&T Prepaid Actually Gives You
AT&T prepaid is a proper US mobile plan sold to anyone, not a contract. Its big advantage over a tourist eSIM is that it comes with a real US phone number - one that can make and receive regular calls and SMS text messages, not just data. That matters in specific situations:
- You need to receive US SMS verification codes (some banks, rideshare, and delivery apps prefer a local number).
- You want a number to give to hotels, tour operators, or people you meet.
- You are staying long enough that a monthly plan is better value than a short travel package.
AT&T runs one of the three big US networks, so coverage in cities and along major highways is strong. For a student, a long-term visitor, or someone relocating, a prepaid plan with a US number is often the right call.
The Catch With AT&T Prepaid for Visitors
Here is the part most guides skip. Getting AT&T prepaid working as a foreign visitor can be fiddly:
- You usually need to set it up in a store or online, not from your sofa before the trip. Walking into a store on arrival costs time on day one.
- ID is required, and online sign-up flows are often built around a US billing address and sometimes ask for details a tourist does not have. Some prepaid activations get smoother with a US address on file, and a few checks can stall without one.
- Activation can be inconsistent for travellers. Some people activate in ten minutes; others spend an afternoon on hold or swapping SIMs because the number did not port or provision cleanly.
- You need a physical SIM or a compatible eSIM profile from AT&T, and eSIM activation with a US network as a foreigner is not always the frictionless path it is for residents.
None of this is a dealbreaker if you plan for it. But if you land expecting to be online in five minutes, a network store visit is not that. (We are not quoting exact AT&T prices here because prepaid rates and taxes change by state and plan - check AT&T directly for the current cost.)
What a Tourist eSIM Gives You
A tourist eSIM like eSIMpass's US plan is built for exactly the opposite priority: speed and zero paperwork. You buy it online, get a QR code by email, and scan it before you even leave home. The moment you land and your phone finds a signal, you are online.
- No store, no ID, no US address. You buy it like any other online purchase.
- Instant QR delivery and no activation fee. Install at home, switch it on when you land.
- Data-only, prepaid. You pick the data bundle you need and there is no contract or monthly bill to cancel later.
- It connects to a major US network (such as T-Mobile or AT&T, depending on the host network), so you get real 4G/5G coverage in cities and along the routes travellers actually use.
The one honest limitation: a tourist eSIM is data-only. It does not come with a US phone number, so you cannot receive a normal US call or SMS on it.
Pricing: What a US eSIM Costs
| Data | Duration | Price |
|---|---|---|
| 3GB Data | 15 Days | £3.60 |
| 5GB Data | 30 Days | £5.39 |
| 10GB Data | 30 Days | £9.71 |
| 20GB Data | 30 Days | £17.47 |
| 50GB Data | 30 Days | £39.32 |
| 1 Day | 1 Day | £2.59 |
| 2 Days | 2 Days | £5.19 |
| 3 Days | 3 Days | £7.78 |
| 4 Days | 4 Days | £10.20 |
| 5 Days | 5 Days | £12.93 |
| 6 Days | 6 Days | £15.67 |
| 7 Days | 7 Days | £18.41 |
| 8 Days | 8 Days | £19.78 |
| 9 Days | 9 Days | £21.83 |
| 10 Days | 10 Days | £23.20 |
| 11 Days | 11 Days | £25.25 |
| 12 Days | 12 Days | £27.30 |
| 13 Days | 13 Days | £28.67 |
| 14 Days | 14 Days | £30.04 |
| 15 Days | 15 Days | £32.09 |
| 16 Days | 16 Days | £33.46 |
| 17 Days | 17 Days | £34.15 |
| 18 Days | 18 Days | £35.51 |
| 19 Days | 19 Days | £37.57 |
| 20 Days | 20 Days | £38.94 |
| 21 Days | 21 Days | £40.30 |
| 22 Days | 22 Days | £40.99 |
| 23 Days | 23 Days | £41.67 |
| 24 Days | 24 Days | £42.36 |
| 25 Days | 25 Days | £43.04 |
| 26 Days | 26 Days | £43.73 |
| 27 Days | 27 Days | £44.41 |
| 28 Days | 28 Days | £45.09 |
| 29 Days | 29 Days | £45.78 |
| 30 Days | 30 Days | £47.15 |
Plans start at £2.59 and scale up with data. For a short trip, that is typically cheaper than a full network prepaid plan, because you are paying only for the data you will use rather than a monthly voice-and-text package. If you want to compare against other budget options, our travel eSIM comparison puts the numbers side by side.
Not sure how much data you need? Estimate it here:
"But I Need a US Number" - The Dual SIM Workaround
The number question is the one that makes people default to a network SIM. Before you do, know that you probably do not need a US number as much as you think.
Most travellers only need a phone number for two things: messaging apps and the occasional SMS code. Here is how a data-only eSIM handles both:
- WhatsApp, iMessage, Telegram, Signal all run over data and stay tied to your home number. Your friends and family reach you exactly as they always do. Nothing changes.
- SMS codes from your home bank or apps still arrive on your home number if you keep it active in your phone's second SIM slot.
The setup is dual SIM: keep your home SIM in the phone for calls and texts (with data roaming turned off so it does not cost you), and use the eSIM as your active data line. Almost every eSIM-capable phone supports this. We wrote a full walkthrough on keeping your number and WhatsApp working in this guide to using a US eSIM without losing your number, and if you are a student who genuinely needs a local number long-term, our guide on cheap data for international students in the US covers when a network plan is the smarter move.
Where dual SIM does not solve it: if you specifically need to receive calls or texts on a US number - a landlord, a US-only service, a job that texts a local number - then you need the actual US number, and that is AT&T prepaid's territory.
Head-to-Head: eSIM vs Network Roaming vs Local SIM
eSIM vs Roaming vs Local SIM
Compare your options for United States
| eSIMpass | Roaming | Local SIM | |
|---|---|---|---|
| Setup time | Instant | None | 30-60 min |
| Cost per GB | ~$2-5 | $10-50+ | ~$3-8 |
| Surprise fees | None | Likely | Unlikely |
| Buy before trip | Yes | Yes | No |
| Keep your number | Yes | Yes | No |
| Speed | 4G/5G | 4G/5G | 4G/5G |
A tourist eSIM wins on setup speed and short-trip price. A network prepaid SIM wins when you need a US number or you are staying long enough that a monthly plan is better value. Network roaming on your home plan (the third option) is the most expensive per GB and only makes sense for a day or two. If you want the full breakdown of when roaming is or is not worth it, see our eSIM vs roaming comparison.
Which One Suits You?
Choose a tourist eSIM if:
- Your trip is a few days to a couple of weeks.
- You mostly need data: maps, rideshare, WhatsApp, email, social, streaming.
- You want to be online the minute you land, with no store visit.
- You are fine keeping your home number for calls and texts via dual SIM.
Choose AT&T prepaid (or a similar network plan) if:
- You are staying a month or longer.
- You need a real US number to receive local calls and SMS codes.
- You are relocating, studying, or working in the US.
- You do not mind a store visit or an online setup with ID on day one.
Plenty of long-stay visitors actually do both: an eSIM for instant data on arrival, then a network prepaid number once they have settled in and had time to visit a store. The eSIM covers the gap so you are never offline while you sort out the number.
How to Get Set Up Either Way
For the eSIM route, it takes about three minutes:
- Buy your US eSIM and complete checkout.
- Receive your QR code by email instantly.
- Scan it under Settings, add the eSIM as a second line.
- Switch the eSIM to your data line and keep your home SIM for calls.
- Land and connect - you are online as soon as your phone finds a signal.
For the AT&T route, plan for a store visit or an online order with ID, and give yourself a buffer in case activation takes longer than expected. Do not count on being connected the instant you land. If your phone needs checking first, our notes on eSIM-compatible devices and installation and activation will tell you whether your handset is ready.
Frequently Asked Questions
Does a tourist eSIM give me a US phone number?
No. eSIMpass's US plan is data-only, so it does not come with a US number and cannot receive normal US calls or SMS. Your calling and texting stay on your home number through dual SIM. If you specifically need a US number, that is where AT&T prepaid or a similar network plan comes in.
Can I receive SMS verification codes on a data-only eSIM?
Codes sent to your home number still arrive if you keep your home SIM active in the phone's second slot. Codes that must go to a US number will not, because the eSIM has no number. For US-number SMS, you need a network prepaid SIM.
Is AT&T prepaid hard to set up as a tourist?
It can be. Activation is usually done in a store or online, needs ID, and sometimes runs more smoothly with a US billing address. Some visitors activate quickly, others hit snags. Budget time for it and do not rely on being online the moment you arrive.
Which is cheaper for a one-week trip?
For a short trip, a tourist eSIM is usually cheaper because you pay only for the data you use, not a full voice-and-text monthly plan. Plans start at £2.59. We are not quoting AT&T's exact prices here since they vary by plan and state, but a monthly network plan is generally more than a week of eSIM data.
Can I use both an eSIM and a network SIM at the same time?
Yes, on most modern phones. A common long-stay setup is to land with an eSIM for instant data, then add an AT&T prepaid number later for calls and texts. The two coexist through dual SIM, and you choose which line handles data.
Will an eSIM work as soon as I land in the US?
Yes. Install it at home before you fly, then switch it on when you arrive. It connects to a major US network (such as T-Mobile or AT&T) as soon as your phone finds a signal, so you are online walking out of the terminal - no store visit required.
Online the minute you land, no store visit required
Join 10,000+ travellers who chose eSIMpass. Instant QR delivery, no ID, no US address. Keep your home number for calls via dual SIM.
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