What it is
Apple describes an eSIM as an industry-standard digital SIM built into the iPhone, which removes the need for a physical SIM card. Android phones with eSIM work the same way: the plan is downloaded to the phone.
eSIM or plastic SIM
| Travel eSIM | Local plastic SIM | |
|---|---|---|
| How you get it | By email or an app, before you leave | At a shop or airport counter |
| Your home SIM | Stays in the phone | Comes out unless the phone takes two SIMs |
| Installing | A link or a QR code, on Wi-Fi | Swap the card, sometimes register it |
What you need
- A phone that takes an eSIM: iPhone XS, XS Max, XR or later, and many recent Android phones. Check yours in a minute.
- A phone that is not locked to your carrier. On iPhone, Settings > General > About must say No SIM Restrictions next to Carrier Lock.
- Wi-Fi or a hotspot while you install it.
What happens to your number
Nothing has to change. Your home line can stay on for calls and texts while the travel eSIM carries the data. Step by step: add an eSIM as a second line.
Ours is data only, with no app and no account: pick a destination and the QR arrives by email. Install steps are on the install page.
Sources
- Apple: set up an eSIM on iPhone (read 4 November 2026)
- Apple: use eSIM while travelling (read 4 November 2026)
Prices on Inbox eSIM are live. Other figures are as published by the sources on the dates shown.