Prepaid SIMs freed travelers from roaming bills. Learn how they work, what to know about SIM cards in the USA, and why a prepaid eSIM is the easier option.
Hey fellow explorers! 🌍 Whether you're flying to New York for a business meeting or backpacking through Europe for a month, one thing is always on the packing list: staying connected. Maps, messages, boarding passes, restaurant reviews, that one photo you need to send home right now. It all needs data.
For years the answer was a prepaid or international SIM card. Today there's an even easier option: the eSIM. In this guide we'll walk you through how prepaid SIMs work, why travelers love them, what the US market looks like, and why more and more people skip the plastic card entirely.
A SIM card is the small chip that connects your phone to a mobile network. With a prepaid SIM, you pay before you use. You load credit or buy a bundle, and when it runs out, you simply top up.
That means:
No contracts: use it for a week or a year, it's up to you. No surprise bills: you only spend what you've loaded. No credit checks: anyone can get one, including tourists and temporary residents.
Plans can focus on calls and texts, on data, or on a mix of both. For most travelers today, data is what really matters.
The biggest win is simple: you avoid roaming charges from your home provider. Instead of paying a fortune per megabyte abroad, you pay a fixed, local style price.
On top of that you get:
Cost control: pick exactly how much data you need. Flexibility: change or top up your plan whenever your trip changes. Freedom: no commitment, so you can switch providers anytime.
The US has three big networks: AT&T, T-Mobile and Verizon. Together they cover almost the entire country. Next to them there are many smaller brands, called MVNOs (Mobile Virtual Network Operators), that rent capacity on those big networks and sell their own plans. Think of names like Mint Mobile, Boost Mobile or Google Fi.
Buying a physical prepaid SIM in the US usually means:
1. Finding a store or airport kiosk after a long flight. 2. Showing ID and picking between plans that are often designed for residents, not tourists. 3. Swapping out your home SIM and hoping you don't lose it.
It works, but it's not exactly the relaxed start to your trip you were hoping for. 😅
An eSIM is a digital SIM built into your phone. It works just like a prepaid SIM (pay upfront, no contract, no surprise bills), but without the plastic card and without the store visit.
With a JamboSim eSIM you:
Buy before you fly: sort your data at home, in a few minutes. Install with a QR code or with one tap in the JamboSim app. Land and go online: your plan connects to a local network as soon as you arrive. Keep your own number: your home SIM stays in your phone for calls and texts, while your eSIM handles the data.
For the US, check our United States eSIM page to see the exact network your plan uses. Traveling through the US and Canada, or even further? Our North America plan, Europe plan and Global plan cover multiple countries with one eSIM.
| | Physical prepaid SIM | JamboSim eSIM | |---|---|---| | Where to buy | Store or airport kiosk | Online, before your trip | | Setup | Swap cards, sometimes register | Scan a QR code or tap in the app | | Your home number | Removed from the phone | Stays active | | Contract | None | None | | Multiple countries | Usually one country | Regional and global plans |
✅ Is your phone eSIM compatible? Check our list of compatible devices. ✅ Is your phone unlocked? A carrier locked phone won't accept a SIM or eSIM from another provider. ✅ How much data do you need? Our data usage calculator gives you an estimate in seconds. ✅ How do I install it? Our setup guide walks you through it step by step.
New to all this? Start with what an eSIM is or read how eSIMs work.
Can I use a prepaid eSIM and my regular SIM at the same time? Yes. Most modern phones support dual SIM, so you keep your own number active while using the eSIM for data.
Do I need a US address or ID for a JamboSim eSIM? No. You simply order online and receive your eSIM by email within minutes.
Can I top up if I run out of data? Yes, you can add more data to your eSIM in your account or in the JamboSim app.
Does a prepaid eSIM include calls and texts? Most of our plans are data only, which works perfectly with WhatsApp, FaceTime and other calling apps. Some destinations also offer plans with voice and SMS.
Prepaid SIMs gave travelers freedom from roaming bills. eSIMs take it one step further: no stores, no swapping, no stress. Pick your destination on our destinations page, install your eSIM and enjoy your trip.
Safe travels, and see you online wherever you go! ✈️
