How to Set Up and Activate Your eSIM: Step-by-Step Guide

Setting up an eSIM is straightforward: purchase a plan from your provider, receive a QR code or SM-DP+ address via email, then scan the QR or manually enter the details through your phone's Settings. The eSIM profile downloads directly to your device's embedded SIM chip, activates within minutes, and sits alongside your physical SIM—so you keep your home number while adding data.

What you need before you start

First, confirm your device actually supports eSIM. iPhones from the XS, XR, and 11 onward all work, as do the Wi-Fi + Cellular iPad models (the Wi-Fi-only iPads do not have eSIM). US-market iPhone 14, 15, and 16 models are eSIM-only—no physical SIM tray at all—so if you bought your phone in the States, you're already using eSIM for your primary line. Most flagship Android phones launched since 2020 carry eSIM support, but budget and mid-range models remain inconsistent; check device eSIM compatibility for your specific make and model before you buy a plan.

You'll receive an eSIM QR code or a pair of codes—an SM-DP+ server address and an activation code—via email immediately after purchase. The QR code is just a machine-readable wrapper around those two strings, so scanning it or typing the details manually produces the same result. Make sure you have a working internet connection: Wi-Fi is ideal, but cellular data on your existing SIM works too. The eSIM profile itself is only a few kilobytes, so the download is near-instant once you trigger it.

For travel eSIMs specifically, complete the installation while you're still at home or have reliable Wi-Fi. The profile will sit inactive until you land, at which point you'll enable data roaming for that line. This approach avoids the airport scramble and lets you troubleshoot any hiccups before departure. Your home SIM stays in place and continues handling calls and SMS, including the two-factor authentication codes banks and apps send—travel eSIMs are almost always data-only, with no local phone number attached.

How to set up an eSIM on iPhone

Apple's eSIM process is consistent across recent iOS versions, though the exact menu labels shift slightly with each update. The steps below apply to iPhone XS, XR, 11, 12, 13, 14, 15, and 16 running iOS 16 or later. If you're on an older iOS build, the "Add eSIM" button may read "Add Cellular Plan" instead, but the flow is identical.

Installing an eSIM via QR code on iPhone

1. Open the email or PDF containing your QR code on a separate device—a laptop, tablet, or even another phone—so your iPhone camera can scan it. (If you only have one device, save the QR image to Photos and use the manual entry method below instead.)
2. On your iPhone, go to Settings → Cellular → Add eSIM (or "Add Cellular Plan" on iOS 15 and earlier).
3. Tap Use QR Code, then point your camera at the displayed code. The phone recognises it instantly and fetches the profile from the carrier's SM-DP+ server.
4. A confirmation screen appears with the plan name and carrier details. Tap Continue, then wait five to fifteen seconds while the eSIM downloads and installs.
5. Choose a label for the new line—"Travel," "Data," or the destination country work well—so you can tell your lines apart. Tap Continue.
6. iOS asks which line you want as your Default Line for cellular data. For a travel eSIM, select the new line; for a secondary work or local SIM, choose based on your preference. You can change this anytime in Settings.
7. The phone also asks which line to use for iMessage and FaceTime. Most travellers leave this set to their home line so contacts reach them on the usual number.
8. Tap Done. The eSIM now appears in Settings → Cellular under your list of SIMs, labelled however you named it.

The eSIM is installed but not yet transmitting data—this is intentional if you're still at home. Once you land, open Settings → Cellular → [Travel eSIM line] → Data Roaming and toggle it on. Your iPhone will connect to the local network within seconds, and the travel eSIM's data allowance becomes active.

Manual SM-DP+ entry on iPhone

1. Go to Settings → Cellular → Add eSIM.
2. Tap Enter Details Manually at the bottom of the QR scan screen.
3. Type the SM-DP+ Address exactly as it appears in your email—usually a domain like lpa.example.com or an IP address. Paste it if possible to avoid typos.
4. Enter the Activation Code in the second field. This is typically a short alphanumeric string (six to twelve characters) or left blank if the provider doesn't require one.
5. Some providers also supply a Confirmation Code; paste it into the third field if present, or leave it empty if your email shows only two values.
6. Tap Next. The iPhone contacts the SM-DP+ server, downloads the eSIM profile, and continues with the same labelling and default-line prompts described above.

Manual entry is also the path you'll use to convert a physical SIM to eSIM on iPhone if your home carrier offers that conversion—they'll send you an SM-DP+ address and activation code rather than a QR, then you follow these steps to install the eSIM version of your existing line. Not all carriers support this, and it's a one-way process (the physical SIM stops working once the eSIM activates), so confirm with your carrier first.

How to set up an eSIM on Android

Android eSIM setup varies more than iOS because each manufacturer customises the Settings menus. Samsung, Google Pixel, and Motorola phones all place the controls in slightly different spots, but the underlying flow—scan a QR or enter SM-DP+ details—is the same. The steps below are generic; your phone's exact menu labels may differ by one or two words.

Installing an eSIM via QR code on Android

1. Open your eSIM provider's email on another device so your phone's camera can scan the QR code. (For single-device scenarios, download the QR as an image and use manual entry instead.)
2. On your Android phone, open Settings → Network & internet → SIMs (Samsung users will find this under Settings → Connections → SIM card manager).
3. Tap Add or the + icon, then select Download a SIM instead? or Add eSIM (the wording varies).
4. Choose Scan QR code. The camera viewfinder opens; point it at the code on your laptop or tablet screen.
5. Android recognises the code, displays the carrier name and plan details, then prompts Download or Activate. Tap it and wait five to ten seconds.
6. Once installed, the eSIM appears in your SIM list. Tap it to assign a label—"Travel Data" or the country name—so you can distinguish it from your physical SIM.
7. Enable the eSIM by toggling the switch next to its name. The phone will attempt to connect immediately if you're already in the destination country; if you're still at home, leave it toggled on but don't enable data roaming yet.

When you arrive, swipe down to open Quick Settings, long-press the mobile-data tile to jump into SIM settings, then tap your travel eSIM and turn on Mobile data and Roaming. The phone registers on the local network within seconds, and your data allowance goes live.

Manual SM-DP+ entry on Android

1. Open Settings → Network & internet → SIMs → Add (or your manufacturer's equivalent path).
2. Select Enter it manually or Use activation code instead of scanning.
3. Paste or type the SM-DP+ Address from your email into the first field.
4. Enter the Activation Code in the second field if your provider supplied one; some plans leave this blank.
5. Tap Download or Continue. Android fetches the profile, installs it, and adds the eSIM to your SIM list.
6. Label the line and toggle it on, just as you would after a QR scan.

Manual entry is particularly useful on devices with fingerprint-smudged cameras or when the QR code renders at low resolution in an email. The activation result is identical—both methods deliver the same eSIM profile to your phone's embedded chip.

Installing your eSIM before you fly

Travel eSIMs should always go onto your phone while you're still connected to reliable Wi-Fi—at home, in the office, or at your hotel the night before departure. The installation itself requires only a few kilobytes of data and completes in seconds, but airports and in-flight Wi-Fi are unpredictable, and the last thing you want is a half-downloaded profile when you land in a new country with no connectivity.

Once installed, the eSIM sits dormant until you manually enable data roaming for that line. This means you won't accidentally burn through your data allowance before you even leave home. When your plane touches down, turn on the travel eSIM's data roaming toggle in Settings, and the phone will register on the local network within seconds—no SIM-card surgery in a cramped airplane bathroom, no hunting for a corner-shop SIM vendor.

Your home SIM remains active throughout, so calls and SMS still come through on your usual number. Text-message two-factor authentication works as normal, which is critical when your bank or email provider sends a login code mid-trip. The travel eSIM handles only data—web browsing, maps, messaging apps, email—so you effectively run two lines at once: home for voice and texts, travel eSIM for data. This dual-SIM behaviour is why iPhones and most Android flagships let you choose a "default line for mobile data" and separately assign voice/SMS to another line.

Managing multiple eSIM profiles on your device

iPhones store eight or more eSIM profiles simultaneously and can run two lines—any combination of eSIM and physical SIM—at the same time. If you install eSIMs for three different trips, all three remain on the phone, but only the one you've toggled "on" and selected as the data line will transmit. You can switch between stored eSIMs in Settings → Cellular by turning one off and another on, with no re-download required—useful for frequent travellers who revisit the same destinations.

Most recent Android flagships store five to seven eSIM profiles, again with two lines active at once (one for data, one for calls, or both for data if you prefer). The exact limit depends on the chipset and manufacturer, but anything launched since 2022 handles at least five. Older profiles don't consume data or battery when inactive; they're just sitting in storage, ready to reactivate with a single toggle.

When you fill all available slots, you'll need to delete an old eSIM profile before adding a new one. On iPhone, go to Settings → Cellular, tap the unwanted eSIM, scroll down, and choose Remove Cellular Plan. On Android, open SIM settings, select the old eSIM, and tap Delete or Forget. Deleting a profile is permanent—if you want to use that eSIM again later, you'll need to reinstall it from the original QR code or SM-DP+ details, and many providers treat this as a fresh activation (meaning any unused data may not carry over). Check your provider's reinstallation policy before you delete.

Labelling your eSIM lines and choosing a default for data

Both iOS and Android let you assign custom labels to each SIM—physical or eSIM—so you can tell them apart in Settings and the status bar. Tap the line in your SIM list, then edit the label field to something meaningful: "Home," "Work," "UK Travel," or "Data Only." This label appears next to the signal bars in the status bar (iOS shows tiny labels like "Home" and "Travel" above the signal dots; Android usually displays an icon or abbreviated text), and it's the name you'll see in Quick Settings when you switch data lines.

The Default Line for Mobile Data setting tells your phone which SIM to use for internet access whenever both are active. For a travel scenario, you'll set the travel eSIM as default once you land, so all apps pull data from the local eSIM's allowance rather than your home carrier's expensive roaming rates. You can flip this toggle anytime: if the travel eSIM runs out of data mid-trip, switch the default back to your home SIM (and accept the roaming charges), or browse eSIM plans to top up with another regional plan.

Calls and SMS can be assigned to a separate line, and iOS will even ask which SIM to use each time you dial a number not already in your contacts. Most travellers leave voice and SMS pinned to the home SIM, so incoming calls and two-factor texts arrive as usual, while data flows through the cheaper local eSIM. This split setup is the real power of dual SIM—no compromises, no forwarding hassles, just both lines running in parallel.

Turning on data roaming for your travel eSIM

Data roaming gets a bad reputation because traditional roaming—your home carrier letting you use foreign networks at extortionate per-megabyte rates—can cost a fortune. A travel eSIM flips this: you're buying a local data plan from a provider in the destination country, so "roaming" in this context just means "allow this eSIM to use mobile data on the foreign network." There's no surprise bill from your home carrier because the home SIM isn't touching data; it's sitting idle or handling only calls and texts.

On iPhone, go to Settings → Cellular → [Travel eSIM name] → Data Roaming and toggle it on. Then return to the main Cellular screen and make sure the travel eSIM is selected as your default line for mobile data. On Android, open Settings → Network & internet → SIMs, tap the travel eSIM, enable Mobile data and Roaming, then set it as the default data SIM if your phone requires an explicit choice.

The phone will search for available networks, lock onto the strongest signal, and display the carrier name in the status bar—often something generic like "Carrier" or a local operator's brand. Open a browser or messaging app to confirm data flows; if nothing loads, toggle Airplane Mode on and off to force a fresh network search, or restart the phone. Most eSIMs connect within thirty seconds of enabling roaming, but dense urban areas or remote regions may take a minute or two to find the best tower.

What to do if the eSIM won't install or activate

If the QR code scan fails repeatedly—camera won't focus, the code is damaged, or iOS/Android returns an error—switch to manual SM-DP+ entry. Copy the server address and activation code from your email, paste them into the manual-entry fields, and proceed. Typos are the most common cause of failed manual installs, so paste rather than type if you can, and double-check for stray spaces or missing characters.

An "Invalid Activation Code" or "Unable to Complete" error usually means the eSIM profile has already been installed once (most travel eSIMs are single-use per QR code) or hasn't yet been released by the provider. Contact your eSIM vendor—they can verify the status of your profile and issue a fresh QR or SM-DP+ address if the original was consumed. If you deleted the eSIM by mistake and need to reinstall it, many providers let you reinstall the same profile once or twice, but policies vary.

No mobile signal after installation typically points to three things: data roaming is still off for that line, the eSIM's plan hasn't started yet (some plans activate on first connection, others on a fixed calendar date), or you're in an area with no coverage from the eSIM's partner network. Check Settings → Cellular (or SIM settings on Android) to confirm data roaming is enabled, then toggle Airplane Mode on and off to force a network re-scan. If the status bar still shows "No Service" after a few minutes, your eSIM may not cover that specific country or region—review the plan details you purchased and, if necessary, reach out to eSIM setup help for troubleshooting.

Keeping your home SIM active for calls and two-factor authentication

A travel eSIM is almost always data-only, which means it has no phone number attached and cannot receive calls or SMS. Your home SIM—whether physical or eSIM—stays in the phone and continues to handle voice and text messages, including the one-time codes banks, email providers, and apps send for two-factor authentication. This is exactly what you want: data on the cheap local eSIM, calls and critical texts on your familiar home number.

Leave the home SIM enabled in your phone's SIM settings, but turn off its data roaming toggle so it doesn't accidentally connect to a foreign network and trigger roaming charges. With data roaming disabled, the home line will still ring when someone calls (over the voice network) and still receive SMS (also over the voice network, separate from data), but it won't pull any internet traffic. All data flows through the travel eSIM, so maps, email, WhatsApp, and web browsing draw from the prepaid allowance you purchased, not your home carrier's roaming rates.

When someone calls your home number, the phone rings as normal; when a call comes in for the travel eSIM's number (which doesn't exist, because it's data-only), nothing happens—there's no second line to ring. If you do need a local number for voice calls while travelling, you'll want a full voice+data eSIM or a traditional local physical SIM, not a typical data-only travel eSIM.

Frequently asked questions