What is an eSIM and How Does It Work? | AirCarta Guide

eSIM Guides · · 9 min read · By AirCarta Team

What is an eSIM and How Does It Work? | AirCarta Guide Modern eSIM in smartphone with AirCarta plans

What is an eSIM?

An eSIM (embedded SIM) is the digital evolution of the traditional SIM card. Unlike plastic SIMs that need to be physically inserted into your phone, an eSIM is built directly into the device’s hardware. You simply download a carrier or travel data plan digitally, no tiny chips, no tools, and no risk of losing it.

With an eSIM, you can switch between operators, add new plans, and stay connected in multiple countries, all without touching your phone’s SIM tray.

Why people love eSIMs

  • No physical handling: Everything happens digitally in seconds.
  • Multiple profiles: Store up to eight plans and keep two active at once, ideal for travelers and professionals.
  • Eco-friendly: Reduces plastic waste and packaging.
  • More secure: Since it’s embedded, it can’t be lost or damaged.

    • How Does an eSIM Work?

    Using an eSIM is remarkably simple. When you purchase an eSIM plan through AirCarta, you’ll receive an activation QR code immediately via email. You just scan it with your phone’s camera or through the cellular settings menu, and your data plan is ready to go.

    Pro Tip: Activate your AirCarta eSIM before boarding your flight, so your data connection is ready the moment you land.

    How to Install and Activate Your eSIM

    On iPhone

  • Open Settings.
  • Tap Cellular → Add eSIM.
  • Choose your activation method:
    • - Scan AirCarta’s QR code. - Use the AirCarta app. - Or enter your activation details manually.
  • Follow the on-screen prompts to complete activation.
    • iPhone eSIM setup screen showing QR code and transfer options

    On Android (Samsung, Google Pixel, Oppo, etc.)

  • Go to Settings.
  • Navigate to Connections → SIM Manager → Add eSIM.
  • Choose to scan a QR code, enter activation details manually, or use the app.
  • Confirm to finalize installation.
    • Scan QR code to activate eSIM

    A stable internet connection is required during setup, so it’s best to activate while connected to Wi-Fi.

    The Advantages of AirCarta eSIM for Travelers

    If you’re a frequent traveler, AirCarta’s eSIM makes staying connected abroad incredibly easy and affordable.

  • Instant setup: Buy online and activate in minutes.
  • Global coverage: Enjoy 4G/5G service in over 260 destinations.
  • Dual connectivity: Keep your home SIM active for calls and texts while using your AirCarta eSIM for data.
  • Tailored plans: Choose by destination, data amount, or trip duration.
  • Eco-conscious: No shipping or plastic, activation is entirely digital.
    • With AirCarta, you’ll have reliable data wherever you go, without expensive roaming fees.

    To see all available travel destinations, visit our list of supported countries.

    Are There Any Drawbacks?

    While eSIMs are revolutionary, it’s important to understand their limitations:

  • Some plans are data-only (no local phone number).
  • Device compatibility varies; check AirCarta’s installation guide to confirm your device supports eSIM.
  • If you lose or replace your device, you’ll need a new activation profile.
  • Like any digital feature, it depends on software updates and stable connectivity.

    • AirCarta eSIM vs. Physical SIM Cards

    Here’s how AirCarta’s eSIM compares to traditional SIM cards:

    Feature AirCarta eSIM Physical SIM
    Activation Instant via QR code or app Manual insertion required
    Multi-profile Up to 8 profiles, 2 active at once 1 SIM per slot
    Durability Embedded, cannot be lost or damaged Can be lost, bent, or worn out
    Eco-Friendly No plastic, shipping, or waste Requires physical materials
    Coverage 260+ countries, instant global access Local coverage only

    SIM Card Sizes Explained

    Here’s how SIM technology has evolved over time, from large plastic cards to embedded chips that never leave your phone.

    SIM card sizes comparison from Standard SIM to eSIM

    Is Your Device Compatible?

    Most modern smartphones already support eSIM, including:

  • iPhones: All models XS/XR and later
  • Samsung: Galaxy S22 and newer
  • Google Pixel: Pixel 4 and newer
  • Oppo and others: Recent flagship models

    • Check the full installation guide to verify compatibility.

    Travelers using eSIM-enabled devices around the world

    Frequently Asked Questions

    Can I make calls with AirCarta eSIM?

    If your plan includes a number, yes, but most eSIM travel plans are data-only. You can still make calls and send messages through apps like WhatsApp, FaceTime, or Skype.

    Does AirCarta eSIM work internationally?

    Absolutely. AirCarta automatically connects to the best local networks in over 260 countries, eliminating roaming charges.

    How much does AirCarta eSIM cost?

    You only pay for the data plan you choose, no card fees, shipping, or setup charges. Plan prices vary by region and duration.

    What if I lose my phone?

    Simply contact AirCarta support to reissue your activation profile. Since it’s digital, you can reinstall it instantly on your new device.

    Why Choose AirCarta?

  • Unlimited data options and flexible terms
  • Instant activation and reliable service
  • Transparent pricing, no roaming surprises
  • Global reach with premium network partners

    • 👉 Visit AirCarta.com 👈

    Browse eSIM plans for 190+ countries