What Is an eSIM and How Does It Work?
Learn what an eSIM is, how it differs from a physical SIM card, and why it's the future of mobile connectivity for travelers.
What Is an eSIM and How Does It Work?
An eSIM (embedded SIM) is a digital SIM card built directly into your device. Unlike a traditional physical SIM card that you insert into a tray, an eSIM is a small chip soldered onto your phone's motherboard that can be programmed with carrier information remotely.
How Does an eSIM Work?
When you purchase an eSIM plan from Roambit, you receive a QR code or activation link. Scanning this code downloads a digital carrier profile onto your device's eSIM chip. This profile contains all the information your phone needs to connect to mobile networks - just like a physical SIM card, but without the plastic.
Key advantages of eSIM technology:
- Instant activation - No waiting for a SIM card to be shipped. Get connected in minutes.
- Multiple profiles - Store several eSIM plans on one device and switch between them.
- No physical swap - Keep your primary SIM card in place while adding a travel data plan.
- Eco-friendly - No plastic SIM cards, no packaging, no shipping.
eSIM vs Physical SIM
| Feature | eSIM | Physical SIM |
|---|---|---|
| Activation | Instant (QR code) | Requires shipping or store visit |
| Storage | Multiple profiles | One per slot |
| Switching | Tap in settings | Physically swap cards |
| Risk of loss | None | Can be lost or damaged |
| Environmental impact | Zero waste | Plastic + packaging |
Which Devices Support eSIM?
Most modern smartphones released after 2019 support eSIM technology, including:
- Apple: iPhone XS and newer, iPad Pro (3rd gen+), iPad Air (3rd gen+)
- Samsung: Galaxy S20 and newer, Galaxy Z Flip/Fold series, Galaxy A54 5G
- Google: Pixel 3 and newer
- Other: Huawei P40+, Xiaomi 13+, OnePlus 12+, Motorola Razr
Tip: Not sure if your device supports eSIM? Check our guide: How to Check if Your Device Supports eSIM.
How to Get Started with Roambit eSIM
- Check compatibility - Verify your device supports eSIM
- Choose a plan - Browse our data plans for 200+ countries at esim.roambit.io
- Purchase & install - Scan the QR code to download your eSIM profile
- Activate abroad - Turn on data roaming when you arrive at your destination
That's it! You're connected and ready to explore.
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