What Is an eSIM?
An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of inserting a plastic chip, you scan a QR code and your phone downloads the carrier plan instantly — no post office, no SIM tray, no waiting.
How an eSIM works
A traditional physical SIM is a removable chip that identifies you to a carrier network. An eSIM does the same thing, but it's permanently soldered inside your device from the factory. The SIM is "empty" until you scan a QR code — that QR download installs your carrier plan onto the eSIM chip, and you're connected within seconds.
You can store multiple carrier profiles on one eSIM and switch between them in software. Most modern phones support 2 active SIMs simultaneously: one physical SIM (your home number) and one eSIM (a travel plan).
eSIM vs physical SIM — key differences
Which phones support eSIM?
eSIM support is now standard on flagship and mid-range phones released from 2018 onwards. Key models:
**iPhone:** XS, XR (2018) and all models after. iPhone 14 US models and iPhone 15/16 worldwide are eSIM-only — no physical SIM slot.
**Samsung Galaxy:** S20 series (2020) and later, Z Fold 2+, Z Flip 5G+.
**Google Pixel:** Pixel 3 and later. Pixel 7a, 8, 9 support dual eSIM with no physical SIM needed.
**Other:** Most 2022+ Android flagships from OnePlus, Motorola, and Huawei (outside China) support eSIM.