Destination
eSIM for the USA: mobile data, SIM cards and staying connected
How to stay connected in the US: what to check about roaming, which eSIM plan fits a vacation, business trip or study stay, and where coverage drops between states.
Plan for your trip: United States · 5 GB · 30 days — See plans →
The easiest way to get mobile data in the USA as a tourist is a travel eSIM: you install it at home as a second line, and data comes on as soon as you land. Roaming on your home SIM doesn’t work on every phone in the US, since you need 4G and VoLTE. A local SIM only makes sense if you can’t do without a US number, for a rental, work or school.
What are your options for mobile data in the USA?
You can get mobile data in the USA with a travel eSIM, home carrier roaming, a local SIM or Wi-Fi, and it’s best to choose before you fly. Your home carrier usually offers roaming in the US, but it costs noticeably more than at home and doesn’t work on every phone. You can buy a local SIM at a carrier store, but it takes time and a suitable phone. Wi-Fi is available at airports, cafés and hotels, but it won’t help on the road. That leaves an eSIM, which you install at home and switch on when you land.
| Option | What you need | When it makes sense |
|---|---|---|
| MoreSim eSIM | A phone that supports eSIM | Data right after landing, and you keep your home number |
| Local SIM | A store visit, a free SIM slot or eSIM | Long stays, or you need a US number |
| Home carrier roaming | A phone with 4G and VoLTE, roaming enabled | Calls and texts on your own number; data usually much pricier |
| Wi-Fi | Café, hotel, airport | Evening uploads and video calls |
Free Wi-Fi is common in the US: at airports, chain cafés, malls and hotels. But many networks have a login page where you accept terms or enter an email, and in hotels the signal in your room can be weaker than in the lobby. Think of Wi-Fi as a backup for heavy downloads, not your main connection.
How to install an eSIM for the USA before you fly
You install an eSIM for the USA at home, before you fly: buy a MoreSim plan on the website or in the @moresim_bot Telegram bot, pay with Telegram Stars from any country, right in the bot (bank card and SBP payments currently work with cards issued in Russia), and the QR code arrives in the chat in about 30 seconds. The plan starts counting from its first connection to a network in your destination country, so you can install the profile ahead of time.
- Check that your phone supports eSIM: the bot has a compatibility check.
- Pick a US plan and pay on the website or in the bot.
- Install the profile from the QR code at home over Wi-Fi.
- After landing, turn off airplane mode and wait for the phone to find a network.
- Pick the eSIM for cellular data and turn on data roaming for it: most travel eSIMs connect to a local carrier’s network as roaming SIMs, so without it you won’t get data. Menu names depend on the model and OS version.
- Turn off cellular data on your home SIM so your data doesn’t go through your home carrier. Keep the line itself on if you’re expecting bank texts.
The plan runs on local carriers’ networks: 4G and 5G where there’s coverage, and which network you get depends on the location and the phone. If you run out of data before the end, use “Top up data” on the eSIM card in your account or in the bot’s app, if top-ups are available for that plan. No new eSIM needed.
US SIM card or travel eSIM?
The key difference between a US SIM card and a travel eSIM is the phone number. MoreSim plans are mobile data only, with no phone number, so there are no cellular calls or texts. For most tourists that’s not an issue: friends, hotels and guides are all reachable through messaging apps, and you can call through them wherever there’s signal.
A local SIM makes sense if you can’t do without a US number: renting a place, work, school, or services that only send codes to a local number. You get it at a carrier store, and choosing a plan and terms is a separate project.
Calls to family back home are easier through messaging apps too: voice and video calls go over the internet, and the time difference is the real challenge. Agree in advance on times that work for both sides.
Does an iPhone from the US work with eSIM only?
US versions of the iPhone, starting with the iPhone 14, work with eSIM only: they have no physical SIM slot, so you can’t put a plastic SIM from home into one. Plenty of travelers bring a new iPhone back from America or already use one bought there, so it’s worth checking this before you buy.
If you’re buying a phone during your trip, decide ahead of time how you’ll move your home number onto it. Many carriers issue eSIMs, but some let you do it in their app while others only do it in store in your home country. Check before you fly, or your number will stay in your old phone until you’re back. A MoreSim data plan installs on a US iPhone as usual, from a QR code. To see whether a phone has a SIM tray, look at the side of the frame.
Where does cell coverage drop in the USA?
In US cities, mobile data usually works without surprises. The trouble starts outside them. National parks, canyons, deserts and long interstate highways are places where there may be no signal for dozens of kilometers, and no plan will change that.
- Download offline maps for your whole route, not just the cities.
- Screenshot your hotel, car rental and ticket bookings.
- Download playlists, podcasts and guides over Wi-Fi before you set off.
- Let family know you may be out of reach for several hours in a national park.
- Park visitor centers and roadside diners sometimes have Wi-Fi, but don’t count on it.
If your route continues to Canada or Mexico, a US plan won’t work there: each country needs its own plan. The MoreSim journal covers neighboring destinations too.
How much data do you need in the USA, from a weekend to a semester?
How much data you need in the USA depends on the length of your trip and your habits; data amounts and validity for the country are on the US catalog page. A layover or a single day in a city takes very little: texting that you’ve landed, calling a ride, opening a map.
For a one- or two-week vacation with maps, messaging and social media, 3–5 GB is usually enough. If you plan to shoot and post a lot of video or share data with a laptop, get extra headroom, since that uses several times more. To estimate your own usage, see our guide to how much data you need for a trip.
For study, an internship or a long family visit, compare the data amounts and validity on the catalog page with your schedule. A travel eSIM helps in the first weeks before you sort out a local number, or as your main data plan if you have Wi-Fi at home and on campus. Compare the data and validity with how you actually use your phone.
If you have no data after landing, check that the eSIM is selected for mobile data and that data roaming is on for it. Still nothing? Message us — support is available.
FAQ
What’s the easiest way to get mobile data in the USA as a tourist?
The most stress-free option is to install an eSIM at home before you fly. With MoreSim, the QR code arrives in the chat in about 30 seconds, and the plan starts counting from its first connection to a network in the US. After landing, turn off airplane mode, pick the eSIM for cellular data and turn on data roaming for it. Your home SIM stays in the phone.
Will my home carrier’s roaming work in the US?
Major carriers usually offer roaming in the US, but with caveats. As of October 2026, 2G and 3G networks in the US are shut down almost everywhere, so your phone needs 4G and VoLTE: on older models the SIM may fail to register on the network, which means no calls and no texts. Roaming data is usually much pricier than at home, so check the terms with your carrier before the trip.
Which eSIM should I buy for a trip to the USA?
A travel eSIM with a US plan does the job; data amounts and validity for the country are on its MoreSim catalog page. For a one- or two-week vacation with maps, messaging and social media, 3–5 GB is usually enough, while heavy video users and anyone sharing data with a laptop need more. Before you buy, check your phone’s compatibility in the @moresim_bot Telegram bot.
Will I get a US phone number with a MoreSim eSIM?
No. MoreSim plans are mobile data only, with no phone number. Calls and chats work through messaging apps, and your home number stays on your home SIM for bank texts. If you need a US number for work, a rental or school, you can get one separately from a local carrier.
Can I put a physical SIM card in an iPhone bought in the US?
It depends on the model. US versions of the iPhone, starting with the iPhone 14, ship without a physical SIM slot and work with eSIM only, so a plastic card won’t fit. Check for a tray on the side of the phone or look up the model’s specs. For data on the road, an eSIM works fine: you can check compatibility in the @moresim_bot Telegram bot, and the plan installs from a QR code.
Is there cell service in US national parks?
In US national parks, there’s usually signal near visitor centers, villages and main roads, but in canyons, deserts and on trails there may be none for dozens of miles. Every SIM behaves this way: it’s the terrain, not your plan. Download offline maps for your whole route and screenshot your bookings before you enter the park.