eSIM basics

What Is an eSIM and How Does It Work?

No plastic card, no store visit — just a QR code and a few taps. Here is exactly how it works.

Published July 1, 2026 · beccamobile.com

If you have never used one, "eSIM" can sound like a confusing piece of jargon. In practice it is simple: an eSIM is a SIM card built into your phone's hardware instead of a plastic chip you insert. You activate it with a QR code or a tap instead of a trip to a phone shop.

eSIM vs. physical SIM, in plain terms

A physical SIM is a small removable chip that stores your mobile network's identity. An eSIM (embedded SIM) does the same job, but the "chip" is soldered into the phone and reprogrammed electronically. Instead of physically swapping a card, you install a new network profile over the air.

For travelers, this means no airport kiosk, no passport scan, no tiny card to lose, and no waiting for a store to open. You can buy and activate an eSIM before you even board your flight.

What you can do with an eSIM

✓Add a second phone number or data plan without a second phone
✓Keep your home SIM active for calls and texts while using a travel eSIM for data
✓Switch networks instantly when you land in a new country, no store visit required
✓Share your eSIM connection as a hotspot for a laptop or tablet

How to install one

1
Buy your plan
Pick your destination and travel dates, then check out — you receive an email within minutes.
2
Scan the QR code or tap the install link
iPhone and most Android phones let you install directly from the confirmation email.
3
Land and turn it on
The eSIM activates automatically when your phone connects to a network at your destination — not before.

Not sure if your phone supports eSIM? See the full device compatibility guide, or check supported devices.

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Frequently asked questions

Do I need to remove my regular SIM card to use an eSIM?+

No. Most modern phones support having a physical SIM and an eSIM active at the same time (dual SIM). Your regular number keeps working for calls and texts while the eSIM handles data.

Can I use an eSIM on an old phone?+

Only if the phone has eSIM hardware built in. This generally means iPhone XS or newer, and flagship Android phones from around 2020 onward. Check the device compatibility guide for specifics.

What happens if I lose or change my phone?+

Since there is no physical card, you cannot simply move an eSIM to a new phone by removing a chip. Most providers, including Becca Mobile, let you re-download the eSIM profile if you contact support before switching devices, but plans are generally tied to a single device once activated.

Does an eSIM work the same as a physical SIM once installed?+

Yes. Once active, there is no functional difference — same data speeds, same network quality, same hotspot capability.

Is an eSIM more expensive than a physical SIM?+

Not necessarily. In many cases eSIM travel plans are cheaper than airport SIM kiosks or your home carrier's roaming fees, since there is no physical card, no retail markup, and no in-store staff cost.

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