Activating an eSIM Step by Step: QR Code, Manual Entry, First Connection
Installing an eSIM profile and activating it are two separate events, and understanding the difference will save you from surprises at the airport or when you land.
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- Country, regional and global data plans
- Install by QR code, no physical SIM
- Keep your own number for calls and WhatsApp
Scan with your phone camera to open the app
How long eSIM activation takes and the timeline you need to know
Activation is not instant, and the word itself covers three distinct steps that happen at different times. Purchase happens immediately when you pay. Installation happens when you add the profile to your phone, ideally at home over Wi-Fi before you leave. Activation, in the sense of the plan becoming live and the countdown starting, happens only when your phone connects to a supported mobile network in your destination.
Here is what each stage means in practice:
| Stage | What happens | Typical time | Where |
|---|---|---|---|
| Purchase | You buy the plan, receive QR code or app credentials by email | Instant to 2 minutes | Anywhere, on any connection |
| Installation | Profile downloads to your device, appears in Cellular/Mobile Data settings | 30 seconds to 3 minutes | Home, hotel, airport lounge - any Wi-Fi |
| Activation (first connection) | Phone registers on local network, plan validity period starts | 10 seconds to 2 minutes | At destination, when you turn on the eSIM line and enable data roaming for it |
Most confusion arises because people expect the clock to start ticking the moment they install the profile. It does not. If you install a seven-day plan at home on Monday and fly to Japan on Thursday, your seven days start on Thursday when your phone finds a Japanese network, not on Monday when you scanned the QR code.
Installation is the technical act of adding the profile. Activation is the commercial start of service. Keep them separate in your mind and you will avoid the common mistake of installing too early and panicking, or installing too late and fumbling with a QR code in a taxi with no Wi-Fi.
Installing an eSIM using a QR code
The QR code method is the most common. After purchase, you receive an email with a QR code image or a link to view it. You need a second screen to display the code while your phone scans it, or you can save the image and view it on a tablet or laptop.
- Connect your phone to Wi-Fi. Cellular data works too, but Wi-Fi is more reliable and avoids using your existing plan's data allowance.
- On iPhone, go to Settings > Cellular > Add eSIM. On recent iOS versions, tap 'Use QR Code'. On Android, the path varies: Settings > Network & Internet > SIMs > Add (or Settings > Connections > SIM Manager > Add eSIM), then scan QR code.
- Point your camera at the QR code displayed on another device or printed on paper. The phone reads the encoded SM-DP+ address and activation code automatically.
- Confirm the prompt to add the cellular plan. The download begins. It can take thirty seconds or up to three minutes depending on server load and connection speed.
- Once installed, label the new line something memorable like 'Travel' or the country name. Do not turn on 'Turn On This Line' yet if you are still at home - leave it off until you land.
- Check that the profile appears in your Cellular or SIM settings. It will show as inactive or no signal, which is expected until you reach your destination.
If the scan fails, check that the QR code is fully visible, well-lit, and not blurry. Some email clients compress images; open the link in a browser or download the full-resolution file. If your phone refuses to add a second eSIM because all slots are full, you may need to remove an old profile you no longer use - but never delete a profile you still need, because you cannot reinstall it with the same QR code once removed.
For trips to United States or United Kingdom, installing the day before departure is common practice. The profile sits dormant until you land and toggle it on.
Manual installation with SM-DP+ address and activation code
When a QR code is not practical - perhaps you are on a device without a camera, or the code is damaged - manual entry is the fallback. Every QR code encodes two strings: the SM-DP+ server address and an activation code. The provider's email or account page will list these separately if you ask for manual details.
The SM-DP+ address looks like a domain: sm-v4-009-a-gtm.pr.go-esim.com or similar. The activation code is a long alphanumeric string, often broken with hyphens. You type both exactly as given, with no extra spaces.
- Go to Settings > Cellular > Add eSIM on iPhone, or the equivalent SIM management screen on Android.
- Choose 'Enter Details Manually' or 'Use activation code' depending on your OS version.
- Paste or type the SM-DP+ address in the first field.
- Paste or type the activation code in the second field. Double-check for typos; one wrong character will cause the download to fail.
- Tap Add or Confirm. The phone contacts the server and downloads the profile in the same way as a QR scan.
Manual entry takes longer because of the typing, but it is no less secure or reliable. It is particularly useful when traveling with a tablet that supports eSIM but lacks a rear camera, or when reinstalling on a replacement phone after a device swap - though remember, you can only install a given eSIM on one device at a time, and deleting it from the old phone before installing on the new one is the correct sequence.
If you are heading to Italy or Mexico and bought your plan weeks in advance, manual details can be stored in a note app so you do not rely on having the email accessible at the airport.
Installing directly from an eSIM app without QR codes
Some providers, including the eSIM app we use, let you install profiles from within their iOS or Android application. You log in, choose your plan, tap install, and the app triggers the same download process without displaying a QR code or requiring manual entry.
This method is faster if you are buying and installing in one session, and it keeps all your plans in one place if you travel frequently. The app stores your purchase history, shows remaining data and days, and can deliver the next plan without leaving the interface.
The technical outcome is identical: the profile downloads from an SM-DP+ server and appears in your system settings. The app is simply automating the input of the address and code. After installation, the eSIM behaves exactly as one installed via QR code, and you manage it through the phone's native settings, not the app, once it is active.
For repeat trips to the same region - say, several countries in Asia or Europe over a year - the app approach means less clutter in your email and a single place to check which plans are live and which are exhausted.
What activation means for plan validity and when the clock starts
Activation in the commercial sense - the moment your paid period begins - happens when the eSIM line on your phone successfully registers on a supported mobile network in the destination country or region. Until that registration, the profile is installed but dormant, consuming no data and no calendar days.
This is why you can install a plan a week before departure without wasting any of its validity. The seven days, fourteen days, or thirty days you bought do not begin until your phone shows signal bars on the eSIM line and data starts flowing. If you land, turn on the eSIM, and connect within minutes, your countdown starts immediately. If you land, leave the eSIM off for two days, then turn it on, your countdown starts on day two.
Most plans clearly state 'validity starts on first connection to a supported network'. A few - typically longer regional or global plans - start validity from a fixed date you choose at purchase, but these are the exception. Always check the plan page for the specific trigger; it will say either 'starts on first connection' or 'starts on [date you select]'.
Data-only plans do not expire the moment the calendar period ends if you have data left; the hard limit is whichever comes first, the day count or the gigabyte cap. But once the time window closes, any remaining data becomes unusable. Understanding this prevents the frustration of buying a three-day plan, using it for two days, then realizing the third day vanished because you installed it a day late.
Why activation can stall and how to fix it when your eSIM shows no service
You land, turn on the eSIM line, wait, and nothing happens. No signal, no carrier name, just 'No Service' or 'Searching'. This is rarely a problem with the profile itself; it is almost always a settings issue or environmental factor.
First, confirm you turned on data roaming for the eSIM line specifically. On iPhone, go to Settings > Cellular, tap the eSIM line, and ensure Data Roaming is on. On Android, open SIM settings, select the eSIM, and enable roaming. Many people forget this step because their home SIM has roaming off to avoid bill shock, and they assume the eSIM will work without it. It will not. The eSIM is a roaming service by design; the roaming toggle must be on.
Second, check that you selected the eSIM line for cellular data. In the same settings screen, there is an option for 'Cellular Data' or 'Preferred SIM for data'. Set it to the eSIM. If your primary SIM is still selected, your phone will try to use that for data and the eSIM will remain idle.
Third, give it time and space. If you are in a basement car park or a building with thick walls, the phone cannot see any towers. Walk outside or to a window. Network registration can take thirty seconds in ideal conditions, two minutes in busy airports where thousands of devices compete for capacity. Restarting the phone can also help; it forces a fresh search for available networks.
Fourth, toggle Airplane Mode on for five seconds, then off. This resets the radio and often triggers a new registration attempt. If the phone still shows no service after five minutes in an open area with Airplane Mode cycled, the issue might be coverage. Check the plan details to confirm the network operators it uses and whether your current location is covered. Rural areas or remote islands may lack the specific carrier the eSIM relies on.
Occasionally, the SM-DP+ server is under maintenance or experiencing high load. This is rare but not unheard of during peak travel seasons. Wait ten minutes and try again. If the profile fails to activate after repeated attempts and you are certain your settings are correct, contact the provider's support through their app or email.
Do not delete the eSIM profile because you cannot reinstall it
Once you remove an eSIM profile from your device, the QR code and activation code that installed it become invalid. You cannot scan the same code again to put the profile back. This is a security feature: it prevents someone who intercepts your QR code from installing your plan on their phone after you have already used it.
If your plan has expired and you no longer need it, leaving the profile installed does no harm. It sits in your settings taking up a tiny amount of storage and no data. Many travelers keep old profiles for months as a record of where they have been. If you need the eSIM slot for a new plan and your phone supports only a limited number of eSIMs - typically eight to ten on recent iPhones, fewer on some Android models - then you can safely delete a fully exhausted plan.
But if the plan still has days or data left, do not delete it unless you are certain you will not return to that region before it expires. Some regional plans cover multiple countries; deleting after visiting United Kingdom means you cannot use the leftover data when you transit through another European country covered by the same plan.
If you accidentally delete an active profile, contact the provider immediately. Some can issue a new QR code for a small fee or as a courtesy, but do not count on it. The safest approach is to treat the delete button as permanent and only press it when you are absolutely sure the plan is finished.
Checklist to complete before you fly so activation goes smoothly
Install the eSIM profile at home over Wi-Fi. Do not wait until you land; airport Wi-Fi can be slow or require logins that complicate the process.
Label the new line clearly. Call it 'Travel eSIM' or the country name so you do not confuse it with your primary SIM when toggling settings.
Leave the eSIM line turned off until you arrive. There is no benefit to turning it on early, and it prevents accidental roaming charges if your home carrier tries to use it.
Screenshot the QR code and installation details. Store them offline in your photos or a note app in case you need to refer to them without internet access.
Confirm your phone is unlocked. Carrier-locked devices cannot use third-party eSIMs. Check with your home carrier if you are unsure.
Check which networks the plan uses in your destination. This information is on the plan page. Knowing the carrier names helps you verify that your phone is connecting to the right network.
Enable data roaming for the eSIM line as soon as you land. This is the single most common missed step. Roaming must be on for the eSIM to work.
Set the eSIM as your data line. Go into settings and explicitly choose it for cellular data, or your phone will keep using your primary SIM.
Following this list eliminates most activation problems. The ten minutes you spend checking settings at home saves thirty minutes of troubleshooting in a foreign airport with a dead battery and no local language skills.
Common questions about eSIM activation and installation
Can I install the eSIM profile on my phone while I am still in my home country without it activating immediately?
Yes. Installing the profile at home before your trip is the recommended approach. The plan will not activate or start its validity period until your phone connects to a supported mobile network in your destination country. You can install it days or even weeks in advance, and it will remain dormant until you turn on that line and enable data roaming after you land.
What happens if I scan the QR code but the installation fails halfway through or shows an error?
Check your internet connection first; installation requires a stable Wi-Fi or cellular link to download the profile from the server. If the error persists, try again after a few minutes. Temporary server issues or network congestion can interrupt the download. If repeated attempts fail, contact the provider for a replacement QR code or manual installation details. Do not delete any partially installed profiles until you resolve the issue with support.
Why does my phone say 'No Service' on the eSIM line even after I turned it on in my destination?
The most common cause is that data roaming is not enabled for the eSIM line. Go to your phone's cellular settings, select the eSIM, and turn on data roaming. Also verify that the eSIM is set as your active data line, not your primary SIM. If both settings are correct, toggle Airplane Mode on and off to force the phone to search for networks again, and make sure you are in an area with coverage from the supported carriers.
How long after I land should I wait before the eSIM shows signal and starts working?
Network registration typically takes ten seconds to two minutes once you turn on the eSIM line and enable roaming. If you are in a crowded airport or underground location, it may take longer. Wait at least five minutes in an open area before troubleshooting. If there is still no signal after five minutes, restart your phone and check that all settings are correct.
Can I use the same QR code to install the eSIM on a second phone or reinstall it if I delete it by mistake?
No. Each QR code and activation code pair works only once. After the profile is installed on a device, the code becomes invalid. If you delete the profile or need to move it to a new phone, you cannot reuse the original QR code. Some providers will issue a replacement code if you contact support, but this is not automatic and may involve a fee. Never delete an active eSIM profile unless you are certain you will not need it again.
Do I need to turn off my primary SIM card when I activate the eSIM in another country?
You do not need to turn off your primary SIM, but you should set the eSIM as your active line for cellular data to avoid accidental roaming charges on your home SIM. Your primary SIM can stay on to receive calls and texts if your phone supports dual standby. Just make sure data roaming is off for the primary SIM and on for the eSIM, and that the eSIM is selected as the data line in your settings.
If my eSIM plan lasts seven days, does that mean exactly 168 hours or does it expire at midnight on the seventh day?
Most plans count days as full calendar days in the time zone of first activation, meaning the seventh day ends at midnight local time, not 168 hours after connection. Some providers use rolling 24-hour periods instead. Check the specific plan page for the exact policy. The countdown starts when you first connect to a supported network, so if you activate at 3pm on Monday, some plans expire at midnight Sunday, others at 3pm the following Sunday.
Ready to install your travel data plan? The provider we use sends the QR code instantly after purchase, and you can have the profile installed in under two minutes.
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