What is an eSIM?
An eSIM is a digital SIM built into your phone — you activate a mobile data plan by scanning a QR code, no plastic card needed. This guide covers how eSIMs work, which phones support them, and how to choose the right plan for your trip.
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM card soldered directly into your phone's circuit board. Unlike a traditional nano-SIM — the tiny plastic card you push into a slot — an eSIM exists as a programmable chip. You activate it by downloading a carrier profile rather than swapping hardware.
The technology has been built into most flagship smartphones since 2018. Apple introduced eSIM support with the iPhone XS, and Android manufacturers quickly followed. Today, eSIM is the standard for any phone released by Apple, Google, or Samsung.
For travelers, eSIM changes everything. Instead of hunting for a local SIM vendor at the airport — with the language barriers, unknown pricing, and identity checks that often come with it — you buy a data plan online, scan a QR code, and you are connected before your plane lands.
How does an eSIM work?
When you buy an eSIM plan, your provider generates a carrier profile — a small package of encrypted data that tells your phone which network to connect to, what credentials to use, and what data allowance you have. This profile is delivered to you as a QR code or a direct install link.
Your phone downloads the profile over Wi-Fi and stores it in the eSIM chip. The chip can hold multiple profiles simultaneously — you can have your home carrier profile and a travel eSIM profile loaded at the same time, switching between them without removing anything.
Once installed, the eSIM connects to local network towers exactly like a physical SIM would. The network does not know or care whether you have a plastic card or a chip — it just sees a valid subscriber.
Why travelers use eSIM
Which phones support eSIM?
Most modern flagship phones sold after 2018 support eSIM. The key models are:
| Brand | eSIM support from |
|---|---|
| Apple iPhone | iPhone XS (2018) and all newer models |
| Google Pixel | Pixel 3 (2018) and all newer models |
| Samsung Galaxy | S20, Note20, Fold/Flip 2 (2020) and newer |
| iPad | iPad Pro (2018), iPad Air 3, iPad mini 5 and newer |
Note: US-market iPhones bought before iPhone 14 may only have a physical SIM slot due to carrier requirements. iPhone 14 (US) and later are eSIM-only.
Full device compatibility list →How to install an eSIM
Installing an eSIM takes under two minutes. There are three methods:
- 1QR code scanOpen your phone's camera and point it at the QR code in your confirmation email. Tap the banner that appears and follow the on-screen prompts.
- 2Tap-to-install linkOn a mobile browser, tap the activation link in your confirmation email. Your phone opens the eSIM installer automatically.
- 3Manual entryGo to Settings → Cellular → Add eSIM → Enter details manually. Type in the SM-DP+ address and activation code from your email.
How to choose an eSIM plan
When comparing travel eSIM plans, look at four things: