eSIM Setup Guide: How to Install and Activate Step by Step

Installing an eSIM takes about five minutes when you know what you're doing. It takes considerably longer when you discover mid-process that your phone is carrier-locked, or realize you need WiFi to download the profile and you're already at the airport.

This guide walks through the full process: what to check before you buy, how to install on iPhone and every major Android, how to configure dual SIM correctly, and what to do if something doesn't work after you land.

Before You Install: Three Checks That Matter

Skipping these before buying a travel eSIM plan is how people end up with a QR code they can't use.

Check 1: Does Your Phone Support eSIM?

The fastest way to check: look for an EID (EUICC Identifier) number in your phone's settings.

• iPhone: Settings → General → About → scroll down to "EID"
• Android: Settings → About Phone → SIM card status or IMEI info → look for "EID"

If you see an EID number (it's a long string, usually 32 digits), your hardware supports eSIM. No EID means no eSIM capability on that device. Our compatible devices page has a searchable list by manufacturer and model if you want to confirm before digging through settings.

Check 2: Is Your Phone Carrier-Unlocked?

A carrier-locked phone can only use SIM profiles from its locked carrier. The eSIM hardware exists, but it's restricted. If you bought your phone through a carrier on a payment plan, it may still be locked — especially if you're on a long-term installment deal.

To check: on iPhone, go to Settings → General → About and look for "Carrier Lock." If it says "No SIM restrictions," you're unlocked. On Android, the quickest approach is to try inserting a SIM from a different carrier — if it connects, the phone is unlocked. If not, contact your carrier to request an unlock. Most carriers do this for free once the device is paid off or the contract minimum is met.

Check 3: Do You Have Available eSIM Slots?

Most phones can store multiple eSIM profiles but only activate a limited number simultaneously. Some phones have a hard limit on stored profiles — iPhones, for example, can store up to 8 eSIM plans (older models may differ). If you've been collecting travel eSIMs across trips without deleting old ones, you may hit that limit.

Go to your SIM settings and check what's already stored. Delete expired profiles from previous trips to free up space before adding a new one.

Installing eSIM on iPhone

Apple's eSIM interface is consistent across all supported iPhones (XS/XR through current models). The path is the same whether you're on iOS 16, 17, or 18, though exact label wording may vary slightly.

QR Code Installation (Recommended)

Make sure you're connected to WiFi first. Then:

Manual Entry (If You Can't Scan the QR Code)

This happens when the QR code is displayed on the same phone you're installing to — you can't point a camera at your own screen. In that case:

1. In Settings → Cellular → Add eSIM, choose "Enter Details Manually"
2. Enter the SM-DP+ address (the server URL, usually starting with something like "smdp.io" or a similar domain)
3. Enter the activation code provided by your eSIM carrier
4. Tap "Next" and follow through the confirmation steps

AirVyo sends both the QR code and manual activation details in the confirmation email, so you have both options available.

Installing eSIM on Android

Android eSIM installation varies more between manufacturers than iPhone does, but the underlying process is identical. Here's how it works on the three most common platforms.

Samsung Galaxy

On newer Samsung One UI versions (4.0 and later), the path may be slightly different: Settings → Connections → SIM card manager → Add mobile plan. The steps after that are the same.

For more detailed Samsung-specific guidance including how to manage dual SIM profiles, see our Samsung eSIM guide for travelers.

Google Pixel

Pixel devices are among the most reliable for eSIM installation. Google has prioritized eSIM support since Pixel 2, and the interface is clean and straightforward.

Other Android Devices (OnePlus, Motorola, Oppo, Xiaomi)

The path varies, but the pattern is consistent: go to Settings → Network → SIM or Mobile Network settings, look for an "Add eSIM" or "Add SIM" option, and follow the QR code flow. If you can't find it, search for "eSIM" in your Settings search bar.

Some Chinese-market Android phones — including certain Xiaomi, Huawei, and OPPO models — don't include eSIM support in their regional variant even when the same model supports it elsewhere. If Settings search returns nothing for "eSIM," check your EID in About Phone first. No EID means the hardware isn't present.

Configuring Dual SIM: Keep Your Number Active While Using Travel Data

This step is important and easy to miss. Once your travel eSIM is installed, you need to tell your phone which SIM to use for what. The goal for most travelers: route all cellular data through the travel eSIM (cheaper rates), while keeping calls and texts on your home SIM (your regular number stays reachable).

On iPhone

After installation, go to Settings → Cellular. You'll see both lines listed. Tap "Cellular Data" and select your travel eSIM as the data line. Under your primary SIM, make sure "Allow Cellular Data Switching" is off — this prevents the phone from falling back to your home SIM's data when the travel eSIM signal is weak (which would trigger roaming on your home carrier).

On Samsung

Settings → Connections → SIM manager → "Preferred SIM for data" → select your travel eSIM. Keep "Default calls" set to your home SIM.

On Pixel

Settings → Network & internet → SIMs → tap "Data preference" → select your travel eSIM.

When to Activate: Before the Flight or After Landing

Install the eSIM before you travel. Activation — whether the plan actually starts counting — depends on your specific plan's terms.

Most travel eSIMs from AirVyo activate on first connection in the destination country. That means you can install the profile days before your trip without starting the clock. When your plane lands and your phone connects to a local network, activation begins. For plans with a fixed calendar-day validity (rather than "days from first use"), check the terms before installing early.

The practical upshot: scan the QR code at home over your home WiFi. Don't leave it until the airport. Airport WiFi is slow, congested, and occasionally broken — not where you want to be troubleshooting a profile download. Our full guide on whether to install eSIM before or after your flight covers edge cases and multi-leg itineraries.

Common Mistakes and How to Avoid Them

Most eSIM problems aren't technical failures — they're setup mistakes that are entirely preventable.

Using Mobile Data Instead of WiFi During Installation

eSIM profile downloads require a WiFi connection. If you're trying to install an eSIM because you've already lost data connectivity and you need WiFi to download it... that's the chicken-and-egg problem. Solve it at home before you leave.

Leaving Data Switching On (iPhone)

iPhone has a feature called "Allow Cellular Data Switching" that automatically routes data to whichever SIM has the better signal. This sounds helpful but causes problems when traveling: the phone may fall back to your home carrier's network (expensive roaming) if the travel eSIM signal drops. Turn this off when you're using a travel eSIM for data.

Scanning the QR Code Multiple Times

Most eSIM QR codes are single-use. If you scan it and the installation fails, and then scan it again — the second scan may fail because the first scan already consumed the activation. Contact your provider if this happens; they can usually issue a new code.

Assuming the eSIM Is Active When It's Just Installed

Installed and active are different states. A profile can be installed on your phone but not set as the active data line. Check your SIM settings to confirm the travel eSIM is set as the cellular data source — not just present in your profile list.

Not Checking for Network Coverage at Destination

Travel eSIMs connect to partner networks in each country. Most major destinations have good coverage, but rural areas can vary. Check the plan details for which network it uses in your destination, and whether data roaming is enabled within the eSIM plan for remote areas.

For a deeper look at what to check before and after your flight, see our piece on common eSIM setup mistakes.

If the eSIM Isn't Working After You Land

Your eSIM is installed, you've landed, but there's no data connection. Try these in order:

1. Check that the eSIM is set as the active data line — go to SIM settings and confirm it's selected for cellular data
2. Toggle airplane mode on and off — forces the phone to re-register on the network
3. Check mobile data is enabled for that line — sometimes the line is active but mobile data is toggled off separately
4. Enable data roaming on the eSIM line — some travel eSIMs require roaming to be enabled in your device settings, even though they're technically local to the destination
5. Manually select a network — go to network settings, disable automatic network selection, and manually choose a carrier from the list. If the eSIM connects, switch back to automatic
6. Restart the phone — clears most connection state issues

If none of these work, contact your eSIM provider's support. Most issues are resolved within minutes. For a thorough troubleshooting walkthrough, see our guide on eSIM not working after landing.