eSIM and IMEI: How It Works on Modern Phones

eSIM and IMEI Explained

Modern smartphones increasingly use eSIM technology alongside or instead of physical SIM cards. Understanding how eSIM affects IMEI is important for buyers and users of the latest iPhones, Samsung Galaxy, and Google Pixel devices.

What Is an eSIM?

An eSIM (Embedded SIM) is a digital SIM card built into the phone's chipset. Instead of inserting a physical SIM card, you download a carrier profile onto the eSIM using a QR code or app. The eSIM can store multiple carrier profiles and switch between them.

eSIM and IMEI Numbers

Devices with eSIM typically have two IMEI numbers:

• IMEI 1 — For the primary SIM slot (physical or eSIM)
• IMEI 2 — For the secondary SIM/eSIM slot

On iPhone 14 (US model) and later, Apple removed the physical SIM slot entirely in the US — making the device eSIM-only, with two eSIM IMEIs.

IMEI Check for eSIM Devices

IMEI checking works identically for eSIM devices. Use either IMEI (usually IMEI 1) when running a check on IMEI Check Pro. The check returns device model, carrier lock, and blacklist status regardless of whether the device uses physical SIM or eSIM.

eSIM-Only iPhones (US Market) and International Use

iPhone 14 and 15 US models are eSIM-only and may not work in countries without eSIM carrier support. An IMEI check identifies whether you have a US eSIM-only variant vs the physical-SIM global variant — critical for international buyers.