What Is an eSIM? (The Simple Version)
An eSIM (embedded SIM) is a digital SIM card built permanently into your phone. Instead of buying a tiny plastic chip at the airport and slotting it in with that annoying little pin tool, you buy a mobile plan online, receive a QR code, scan it in your phone settings, and you’re connected.
That’s the whole thing. The “e” stands for embedded — it’s soldered directly onto your phone’s circuit board during manufacturing. You can’t remove it, and you don’t need to. Think of it as a programmable chip that can store multiple carrier profiles at once, and switch between them without touching anything physical.
75%
Flagship phones ship with eSIM (2026)
200+
Countries covered by major providers
8
eSIM profiles iPhone can store
eSIM vs Physical SIM — What’s Different?
Both do the same job: connect your phone to a carrier’s network. The difference is entirely in how they’re managed.
Physical SIM Card
- Removable plastic chip
- One carrier profile at a time
- Need to visit a store or wait for delivery
- Easy to lose, damage, or forget
- Need the pin tool to swap
- Fixed to the device it’s in
eSIM (Digital)
- Built into the phone permanently
- Store up to 8+ profiles at once
- Activate online in under 5 minutes
- Can’t be lost or physically damaged
- Switch plans with a few taps
- Works alongside your physical SIM
💡 Key point: You don’t have to choose between eSIM and your regular SIM. Most modern phones support Dual SIM — your existing physical SIM card stays in the phone, and the eSIM runs alongside it. Keep your home number active, use the eSIM for data abroad.
How Does an eSIM Actually Work?
Behind the scenes, eSIMs use a system called Remote SIM Provisioning (RSP) — a GSMA-standardized way of securely delivering carrier credentials to your phone over the internet. From your perspective, this is what happens:
1
Buy a plan online
Choose a provider (Airalo, Holafly, Saily, etc.), pick your destination and data amount, pay online. You receive a QR code by email within seconds — no waiting for delivery.
2
Scan the QR code in Settings
Go to Settings → Cellular → Add eSIM (iPhone) or Settings → Connections → SIM Manager → Add eSIM (Android). Scan the QR code. Your phone downloads the carrier profile to the embedded chip.
3
Activate when you arrive
Most travel eSIMs are pre-installed but activate only when you connect to a network in the destination country — so your countdown doesn’t start until you actually land. Toggle it on, turn off roaming on your home SIM, done.
4
Your phone connects like any local SIM
The eSIM profile tells your phone to connect to a specific local carrier in that country. You get local data rates, not international roaming prices. For most travelers, this saves 80–90% compared to roaming.
Is My Phone eSIM Compatible?
Over 75% of flagship smartphones shipped in 2026 support eSIM. Here’s the quick guide by brand:
iPhone
From iPhone XS / XR (2018)
All iPhones from XS/XR onwards support eSIM. iPhone 14+ US models are eSIM-only (no physical SIM slot). iPhone 13+ can have two eSIMs active simultaneously.
⚠️ China/Hong Kong models: most do NOT support eSIM
Samsung Galaxy
From Galaxy S20 (2020)
S20 series and later, Z Flip series, Z Fold series, Note 20 series, and select A-series (A54, A55, A56) support eSIM.
⚠️ China/HK/Taiwan variants: usually NOT supported. US carrier-purchased models may have eSIM disabled.
Google Pixel
From Pixel 3 (2018)
Pixel 3 and later support eSIM. Pixel 3 models from Australia, Taiwan, or Japan are excluded. Most Pixel phones have excellent eSIM support globally.
⚠️ US carrier-purchased models may have eSIM disabled by the carrier
Other Android
Varies by model
Most 2022+ flagship Android phones support eSIM. OnePlus 11/12/13 supported. Motorola, Oppo, and Xiaomi have mixed support — check your specific model.
⚠️ Huawei phones post-2022 generally do NOT support eSIM
How to Check if Your Phone Supports eSIM
3 Ways to Check eSIM Support
1
Universal — works on any phone
Open your phone dialer. Dial *#06# and press call. A screen appears with your device info. If you see a 32-digit number labeled EID, your phone has an embedded SIM chip and supports eSIM.
2
iPhone
Settings → Cellular → look for Add eSIM
If that option appears, your iPhone supports eSIM. Alternatively: Settings → General → About — look for “Available SIM” showing eSIM.
3
Android (Samsung / Pixel / others)
Samsung: Settings → Connections → SIM Manager → Add eSIM
Pixel: Settings → Network & Internet → SIMs → Download a SIM
If either option exists, your device is supported. No option = not supported on that firmware.
⚠️ Carrier-locked phones: Even if your phone hardware supports eSIM, a carrier-locked device may block activation. Phones purchased directly from manufacturers (Apple Store, Samsung.com, Google Store) are usually unlocked. Phones purchased through a carrier (AT&T, Vodafone, etc.) may need to be unlocked before using a travel eSIM. Contact your carrier to unlock it.
5 eSIM Myths That Need to Die
“eSIM is only for tech-savvy people”
The setup takes 3 minutes and involves scanning a QR code. If you can take a photo, you can install an eSIM. Most providers walk you through every step.
“You have to remove your home SIM to use an eSIM”
No. Most phones support Dual SIM. Your physical SIM stays in. The eSIM runs alongside it — your home number stays active for calls while the eSIM handles data.
“eSIM plans always include phone calls”
95% of travel eSIMs are data-only. No local phone number. You make calls via WhatsApp, FaceTime, or Zoom. This is fine for most travelers — voice calls over data apps are free.
“I can delete and reinstall my eSIM anytime”
Usually not. Most travel eSIMs are one-time installs. Delete the profile and the plan is gone. Never delete an eSIM during a trip — keep it installed until you’re fully back home.
“All eSIM plans are the same price”
Prices vary enormously. Thailand eSIMs run as low as $1.00/GB. USA plans can hit $4.60/GB. Always compare providers for your specific destination before buying.
Who Should Use an eSIM?
International Travelers
Anyone visiting another country. Saves 80–90% vs. carrier roaming. No airport SIM queues. Connect the moment you land.
Digital Nomads
Cross multiple countries monthly? A monthly eSIM subscription like Holafly Plans gives global unlimited data with zero per-trip admin.
Business Travelers
Avoid billing surprises. Set a fixed data budget, install before you fly, expense a known amount. No unexpected roaming invoices.
Backpackers
Regional eSIMs cover multiple countries in one plan. No need to buy a new local SIM at every border crossing.
Privacy-Conscious Users
eSIMs don’t require registering a local number. Use a data-only plan without handing over ID to a foreign SIM vendor at an airport kiosk.
Eco-Friendly Travelers
No plastic SIM card, no packaging, no waste. A small but real environmental benefit over the physical SIM model.
Where to Get Your First eSIM
There are dozens of eSIM providers. For your first eSIM, these three are the safest starting points — each used by millions of travelers, with reliable setup processes and good customer support:
Airalo
Best overall — 200+ countries from $3.50
The world’s largest eSIM marketplace. Best app experience, widest coverage, flexible data bundles. The easiest first eSIM for most travelers.
airalo.com →
Holafly
Best unlimited — from $6.90/day
Pay by the day, never track GB. Best for heavy data users and multi-country trips. 24/7 human support — ideal if it’s your first time.
esim.holafly.com →
Saily
Best privacy — built-in VPN
Built by Nord Security. Every plan includes a VPN, ad blocker, and web protection. Best for privacy-conscious travelers and remote workers.
saily.com →
eSIM FAQ
Q What is an eSIM? ▾
An eSIM (embedded SIM) is a digital SIM card built directly into your phone’s hardware. Instead of inserting a physical plastic chip, you download a mobile plan online and install it by scanning a QR code. It works exactly like a regular SIM — connecting you to a carrier’s network for data, and sometimes calls and texts.
Q How does an eSIM work? ▾
You buy a plan from a provider online. They send you a QR code. You scan it in your phone settings. Your phone downloads the carrier profile to the embedded chip. When you arrive in the destination country, the eSIM connects to a local network automatically — the same infrastructure locals use, at local prices instead of roaming rates.
Q Which phones support eSIM? ▾
iPhone XS/XR and newer (from 2018), Samsung Galaxy S20 and newer (from 2020), Google Pixel 3 and newer (from 2018). Over 75% of flagship smartphones shipped in 2026 include eSIM support. Important exception: phones purchased in China or Hong Kong often do NOT support eSIM even if the same model sold elsewhere does.
Q Can I use eSIM and my regular SIM at the same time? ▾
Yes. Most modern phones support Dual SIM — one physical SIM and one eSIM active simultaneously. The standard travel setup: keep your home SIM active for calls and SMS, use the eSIM for data. Your home number stays reachable, and you pay local data prices instead of roaming rates.
Q Do I need to remove my SIM card to use an eSIM? ▾
No. Your existing physical SIM card stays in the phone. The eSIM is a separate digital profile stored on the embedded chip alongside your home SIM. You choose which line handles calls, texts, and data in your phone settings.
Q Can I delete and reinstall an eSIM? ▾
Usually not. Most travel eSIMs are one-time installs — if you delete the profile, the plan is gone and cannot be recovered. Never delete an eSIM during an active trip. Keep it installed until you’re fully home and certain you no longer need it.
Ready to Try Your First eSIM?
eSIMs are not complicated. Buy a plan, scan a QR code, land connected. That’s the whole process.
For most travelers, Airalo is the right starting point — widest coverage, lowest entry price, best app. If you want unlimited data and 24/7 human support for your first experience, Holafly is the safer hand-holding option.
Check your phone supports eSIM first (dial *#06# and look for EID). Then browse the guides below to find the right plan for your destination.
