What is an eSIM?
Last updated: April 3, 2026
An eSIM (embedded SIM) is a SIM card permanently built into your device's hardware. Instead of inserting a plastic card, you activate your plan by downloading a carrier profile using a QR code or activation code.
How is it different from a physical SIM?
Physical SIM | eSIM |
Removable plastic card | Chip soldered into the device — cannot be removed |
Insert card to activate | Scan a QR code or enter an activation code |
Swap card to change carrier | Download a new carrier profile |
One plan at a time | Multiple profiles can be stored; one active at a time |
Move card to new device | New profile must be issued for each device |
What do I need to use an eSIM?
- A device with an eSIM chip — not all devices have one. See ****Is my device eSIM compatible?
- A carrier-unlocked device
- A Wi-Fi connection to download the profile during activation
This article doesn't cover:
Device compatibility →Is my device eSIM compatible?
Installation →How to install your eSIM — iPhone / Android / Samsung