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eSIM vs Roaming: Why Travellers Switch (and How Resellers Benefit)
A travel eSIM is usually much cheaper than roaming because you buy prepaid local data instead of paying your home carrier's international rates or daily passes. Roaming is simpler for very short trips or for calls on your own number, but for data most travellers save money with an eSIM — which is why reselling eSIMs is a growing business.
In this article
For years, travellers had two options for data abroad: pay roaming, or find a local SIM card. eSIM added a third option that combines the convenience of roaming with the price of a local SIM.
How roaming works
When you roam, your home carrier lets you use a partner network abroad and bills you for it — per megabyte, per day ("travel passes") or through an add-on bundle. Inside some regions, such as the EU, roaming rules make it cheap; outside them, it can be expensive.
How a travel eSIM works
A travel eSIM is a prepaid data plan for the destination. You install it before you leave, keep your home SIM active for calls and texts if you want, and use the eSIM for data. When the plan ends, it simply stops — no bill. What is an eSIM?
Side-by-side
| Roaming | Travel eSIM | |
|---|---|---|
| Cost for data | Often high outside your home region | Usually much lower, prepaid |
| Bill shock risk | Yes, if you exceed your bundle | No — prepaid, fixed price |
| Setup | None | Scan a QR code or tap a link (2 minutes) |
| Home number | Works as normal | Still works on your main SIM line |
| Speed | Depends on partner network | Depends on the local network of the plan |
| Multi-country trips | Varies by carrier | Regional plans cover many countries |
When roaming still makes sense
- Very short trips where your carrier includes roaming in your plan
- Travel within a region where roaming is regulated and included (for example EU residents in the EU)
- If you mainly need calls on your own number and very little data
When an eSIM wins
- Longer trips and data-heavy travel (maps, video calls, social, hotspot)
- Travel outside your carrier's included zones
- Multi-country itineraries with a regional plan (regional vs country plans)
- Business travel where cost control matters
Why this matters for businesses
The gap between roaming prices and wholesale eSIM prices is the reseller's opportunity. A traveller who would pay a large daily roaming fee is happy to pay less for an eSIM — and that price can still leave you a healthy margin above wholesale. That's the core of the business model in how much you can earn reselling eSIMs.
FAQ
Is an eSIM cheaper than roaming?
In most cases, yes — especially outside your carrier's included roaming zones. A prepaid travel eSIM avoids per-day or per-megabyte roaming charges.
Do I need to turn off roaming when using a travel eSIM?
Turn data roaming on for the eSIM line (travel eSIMs connect as roaming partners) and set your main SIM's data off, so it doesn't use roaming data.
Can I receive calls on my normal number with an eSIM?
Yes, if your phone supports dual SIM: keep your main SIM active for calls and texts. Your carrier may charge for calls received abroad.
Is eSIM data as fast as roaming?
Speed depends on the local network the plan uses. Good eSIM plans use leading local networks and support 4G or 5G where available.
