Q: What is an eSIM?
A: Digital SIM card embedded in device hardware. Carrier profiles downloaded via QR code. Governed by GSMA SGP.22. eUICC chip stores multiple profiles.
Q: How to verify eSIM support?
A: iOS: Settings → General → About → EID. Android: Settings → About → EID, or dial *#06#. 32-digit EID = eSIM confirmed.
Q: Can I use eSIM + home SIM simultaneously?
A: Yes, on dual-SIM devices. Standard config: home SIM for calls/texts + eSIM for local data.
Q: Does eSIM support 5G?
A: Yes, if device and plan support 5G. Set network mode to 5G/LTE in Settings. Netherlands, Sweden, Germany have best 5G deployment.
Q: Is eSIM secure?
A: Yes. Profiles cryptographically bound to device EID. eUICC achieves EAL4+ certification. Cannot be cloned. GSMA SGP.22 mutual auth prevents MITM.
Q: Factory reset deletes eSIM?
A: Yes. Check provider reinstallation policy before reset. Save QR code screenshots. Some providers allow reinstall; others issue single-use codes.
Q: No service after activation. Debug?
A: [1] eSIM enabled [2] Data Roaming ON [3] Airplane Mode toggle [4] Manual network select [5] Restart [6] Contact provider
Q: Carrier-locked device — can I use eSIM?
A: Locked devices may only accept eSIM from locking carrier. Request unlock from carrier. iOS: Settings → General → About → Carrier Lock status.