How to Install an eSIM on iPhone or Android: Step-by-Step Guide 2026

An eSIM is the most practical way to get mobile data abroad without paying roaming charges or hunting for a SIM card kiosk at the airport. The technology sounds complicated — digital SIM, QR codes, profiles — but the actual process takes under five minutes. Here is exactly how it works on every device type, plus every error you might encounter and how to fix it.

Before you start: three things to check

1. Does your phone support eSIM?

Not every phone has eSIM capability. Check before purchasing a plan:

Quick check — any phone: dial *#06#. If you see an EID number in the list that appears, your phone supports eSIM.

iPhone check: Settings → General → About → scroll down. If you see EID or IMEI (eSIM), eSIM is available.

Android check: Settings → Connections (Samsung) or Network & Internet (Pixel/stock Android) → SIM card manager or SIM cards → if you see an Add eSIM option, the phone supports it.

Important caveat: phones sold in mainland China, Hong Kong, and some other markets may have eSIM hardware but with eSIM functionality disabled at the firmware level by the manufacturer for that market. Even if the model generally supports eSIM elsewhere, the China-market version may not. If you are unsure, check with the manufacturer for your specific model and market variant.

2. Is your phone carrier-unlocked?

eSIM support and carrier-unlocked status are separate requirements. A phone tied to a specific carrier (typically bought on contract) may be locked to that carrier's SIMs — including eSIM. You need both eSIM support AND an unlocked phone.

How to check if unlocked: try inserting a SIM from a different operator. If it works — unlocked. If you get "SIM not supported" or "Enter unlock code" — locked.

How to unlock: contact your current carrier. Most unlock phones after the contract period (typically 12–24 months). The process is usually free and takes 1–5 business days. Do this before your trip — not the night before departure.

3. Do you have the QR code ready?

You receive the QR code by email after purchasing your eSIM plan. Have it open on a second device (laptop, tablet) or printed — you will scan it with the camera of the phone you are installing it on.

How to install an eSIM on iPhone — step by step

Method 1: Scan QR code (most common)

1. Open Settings
2. Tap Mobile Data (or Cellular on US devices)
3. Tap Add eSIM (or Add Mobile Plan)
4. Tap Use QR Code
5. The camera opens — point it at the QR code from your provider's email
6. When the plan is detected, tap Continue
7. Tap Add Mobile Plan on the confirmation screen
8. Choose a label for the plan (e.g. "Travel" or the destination name) — this helps distinguish it from your main SIM
9. Choose what this plan is used for: select Mobile Data (leave calls and SMS on your regular SIM)

The profile downloads — typically 10–30 seconds on a good Wi-Fi connection. When the download completes, the plan appears in your SIM list as inactive.

Method 2: Install from image on phone (iOS 17.4+)

If the QR code image is already on your iPhone (saved to Photos, or visible in an email on the same phone):

1. Long-press the QR code image
2. Tap Add eSIM in the menu that appears
3. Continue from step 6 above

This method avoids needing a second device to display the QR code.

Method 3: Manual entry (if QR code is not working)

1. In the Add eSIM screen, scroll to the bottom
2. Tap Enter Details Manually
3. Copy and paste the SM-DP+ Address and Activation Code from the provider's email
4. Tap Next and proceed with the installation

This is useful when the QR code has already been scanned once (making it invalid) or when image quality is poor.

How to install an eSIM on Android — step by step

The menu path varies slightly between manufacturers but the process is identical.

Samsung Galaxy (One UI):

1. Settings → Connections → SIM card manager
2. Tap Add eSIM
3. Tap Scan QR code from service provider
4. Scan the QR code from the email
5. Tap Confirm when the plan details appear
6. The profile downloads — tap Done
7. In SIM card manager: tap the new eSIM → set as Mobile Data SIM
8. Enable Data Roaming on the eSIM profile

Google Pixel (stock Android):

1. Settings → Network & Internet → SIMs
2. Tap + (Add SIM) or Add eSIM
3. Tap Download a SIM instead? if prompted, or select the scan option
4. Scan the QR code
5. Confirm and download
6. Set the eSIM as your data SIM in the settings that follow

Other Android (Xiaomi, OPPO, Motorola, OnePlus):

Look under: Settings → Network & Internet or Mobile Network or Connections. Search for "SIM" in your settings search bar if you cannot find it. The option may be labelled "Download eSIM," "Add eSIM," or "SIM card manager."

After installation: the critical settings

Installing the eSIM profile is step one. These two settings determine whether it actually works:

Step 1 — Set the eSIM as your data SIM

On iPhone: Settings → Mobile Data → Mobile Data (scroll down to the list) → select your travel eSIM as the data line.

On Android: Settings → Connections → SIM card manager → select the eSIM → set as Mobile Data.

Without this, your phone continues using your regular SIM for data (and incurring roaming charges from your home carrier).

Step 2 — Enable Data Roaming on the eSIM profile

This is the most commonly missed step and the most frequent reason eSIMs "don't work" after installation.

On iPhone: Settings → Mobile Data → tap the eSIM plan name → enable Data Roaming.

On Android: Settings → Connections → SIM card manager → tap the eSIM → enable Data Roaming or International roaming.

This setting tells the phone it is allowed to connect to partner networks abroad (which is the entire point of the eSIM plan). Without it, the phone is installed but refuses to connect.

The dual SIM setup: keep your regular number AND use the eSIM

This is the optimal configuration for travel. Most people set it up once and never need to change it:

The result: you pay local data rates through the eSIM while still being reachable on your normal number and receiving SMS codes from your bank without extra charges.

iPhone dual SIM setting: Settings → Mobile Data → tap each function (Data, Calls, Messages) and assign which SIM to use.

Android dual SIM setting: Settings → Connections → SIM card manager → set default SIM for Data, Calls, and Messages separately.

Common errors and how to fix them

"Unable to activate eSIM" or "Download failed"

Most common cause: unstable Wi-Fi. The download requires a consistent connection — the airport Wi-Fi or a crowded café network frequently causes this.

Fix: move to a more reliable Wi-Fi network, restart the phone, and try again. If you are at home, restart your router as well.

"QR code cannot be read"

Causes: poor image quality, screen brightness too low on the device displaying the QR, or the code has already been activated.

Fixes: increase brightness on the device showing the QR code, move to a brighter environment, ensure the camera has good focus. If the code was already scanned (even partially), contact the provider — they will issue a replacement code.

"SIM not supported" or no eSIM option in settings

Causes: the phone does not support eSIM, the eSIM functionality is disabled (China/HK market variants), or the phone is carrier-locked.

Check eSIM support via *#06# (EID number present = supported). If supported but the option is missing, contact your carrier — the phone may need to be unlocked.

eSIM installed but no data connection

Almost always caused by one of two things:

1. Data Roaming not enabled on the eSIM profile (see "critical settings" above)
2. eSIM not set as the data SIM (the phone is using the regular SIM for data)

Check both settings. If both are correct: disable and re-enable the eSIM profile, restart the phone. If still no connection, contact the eSIM provider's support — there may be a network provisioning issue.

"This SIM is not from this carrier" error on installation

Your phone is carrier-locked. The eSIM cannot be installed until the phone is unlocked. Contact your home carrier.

eSIM plan shows "No service" in the destination country

The eSIM plan may not include the specific country you are in, or the partner network in that country is experiencing an outage. Check the plan details on the provider's app — the list of supported networks is usually listed. If the country is included: manually select the network (Settings → Mobile Data → Network Selection → Manual → find a listed partner network).

When to install: before or after departure?

Always install before departure. Here is why:

If you install at home:

• You have a stable Wi-Fi connection
• If anything goes wrong, you have time to troubleshoot or contact support
• The eSIM profile sits dormant on the phone — it does not generate any charges until you activate it
• At the destination, you simply enable it — 5 seconds

If you wait until you arrive:

• Airport Wi-Fi is often unreliable and crowded — downloads fail
• You are tired after a flight and less patient with troubleshooting
• If the QR code fails, you have no data to contact support
• Some destinations (Turkey, notably) block access to eSIM provider websites — you cannot even buy a plan from within the country

One exception: if your provider allows installation via their app with a cellular-data-independent method, you might be able to install later. But the default recommendation remains: install at home, 1–2 days before departure.

Which eSIM to buy

For most destinations, three providers cover the majority of needs:

Airalo — the largest aggregator. Sources plans from hundreds of local providers, offering the most options per country. Best for destinations where you want maximum flexibility or are visiting somewhere unusual. Browse plans on Airalo.

Saily — NordVPN's eSIM product. Includes a basic VPN for public Wi-Fi security (useful in cafés and airports). Competitive pricing for major destinations. Browse plans on Saily.

Yesim — strong regional plans for Europe and Asia. Worth comparing for multi-country trips where a single regional plan beats buying per-country. Browse plans on Yesim.

How to choose: compare prices for your specific destination on all three before buying. The cheapest for Turkey in a given month may be different from the cheapest for the US. Differences are usually €2–5 for a standard week's plan — not enormous, but worth the 2-minute comparison.

For a full comparison by destination (Turkey, UK, USA, Thailand, Egypt, Japan): best eSIM by destination 2026.

For the comparison of eSIM vs roaming — when each option makes more sense: eSIM vs roaming.

After the trip: managing installed eSIM profiles

After you return, the eSIM profile remains on your phone. Options:

Leave it installed (recommended): the profile is inactive and generates no charges. If you return to the same destination, you do not need to reinstall — just reactivate and, if the plan has expired, top up or buy a new plan from the same provider.

Delete the profile: Settings → Mobile Data → tap the eSIM → Delete eSIM. Note: once deleted, the profile cannot be recovered. You would need to purchase a new plan and reinstall for future trips.

Turn it off without deleting: Settings → Mobile Data → tap the eSIM → toggle off Turn On This Line. The profile remains installed and inactive — zero impact on your phone's operation.

Most frequent travellers accumulate several eSIM profiles for their regular destinations — one for Turkey, one for the US, one for the UK — and simply activate the relevant one before each trip.

Related guides

• eSIM vs roaming — when each makes sense — the economics of each option by destination
• Best eSIM by destination 2026 — Turkey, UK, USA, Thailand, Egypt, Japan — real prices compared
• Greece 2026 holiday guide — EU free roaming applies in Greece, but this guide helps for the full trip context
• First cruise guide — why an eSIM beats ship Wi-Fi on every cruise
• How to find cheap flights — the other side of travel planning