1. eSIM not activating after scanning QR code
This is the most common issue and it almost always comes down to one thing: your phone isn't connected to the internet when scanning. You need WiFi or an existing cellular connection to download the eSIM profile. Make sure you scan the QR code before you leave home or while connected to WiFi at the airport.
If it still fails, restart your phone and try again. Some older iOS versions have a bug where the first scan attempt times out silently.
2. eSIM installed but no data connection
You scanned the code, the eSIM shows up in your settings, but there's no data. Three things to check. First, make sure Data Roaming is turned on (Settings then Cellular then your eSIM plan then Data Roaming). Second, verify the eSIM is set as your primary data line, not your home SIM. Third, check that the plan hasn't expired.
A fourth thing people miss: some phones have a setting called "Allow Mobile Data Switching" (iPhone) or similar on Android. If this is enabled, your phone might silently switch data to the home SIM when it thinks the eSIM connection is weak. Turn this off to keep data locked to your travel eSIM.
3. Phone says "No Service" after landing
Most eSIM plans activate on first network connection, not on installation. After landing, give it 1 to 2 minutes. If nothing happens, toggle Airplane Mode on and off. This forces your phone to search for available networks. Still nothing? Go to Settings then Cellular then Network Selection and try selecting a carrier manually.
In some countries (India, Turkey, parts of Southeast Asia), activation can take up to 15-20 minutes as the roaming agreement registers your device. Don't panic if it's not instant - give it time before troubleshooting.
4. Slow data speeds abroad
If your data works but feels sluggish, check if your plan includes speed throttling after a certain limit (FUP plans). Some plans offer unlimited data but reduce speed after the daily or total limit. Also check if your phone is connected to 3G instead of 4G. You can force LTE in your cellular settings.
Another culprit: your phone might be connected to a congested cell tower. Moving 100-200 metres (walking to the next block, leaving a crowded tourist area) can connect you to a different, less congested tower and dramatically improve speed.
5. Can't send or receive SMS
Most travel eSIM plans are data-only. They don't support traditional SMS or voice calls. For messaging, use apps like WhatsApp, Telegram, or iMessage which work over data. If you need to receive OTPs, keep your home SIM active in the other slot and use WiFi calling for verification texts.
This is actually important for banking apps. Many banks send SMS verification codes for logins or transactions. If your home SIM doesn't receive SMS while abroad (some carriers block incoming SMS during roaming), contact your bank before your trip and set up app-based authentication (Google Authenticator or similar) instead.
6. eSIM disappeared from phone
This occasionally happens after a software update. Check Settings then Cellular to see if the eSIM profile is still listed but disabled. If it's been completely removed, you'll need to re-scan the QR code. This is why we recommend taking a screenshot of your QR code as a backup.
On iPhone, you can also check Settings then General then About - scroll down and your eSIM ICCID should still show if the profile is present but inactive. If it's gone entirely, contact your provider - some eSIM QR codes can only be scanned once, and they may need to issue a replacement.
7. Data usage shows zero but plan is active
Your phone's built-in data tracker sometimes doesn't register eSIM usage correctly, especially on Android. The plan is working even if the counter shows zero. To check real usage, log into your account dashboard on getesimonline.com and hit the Sync button on your eSIM profile.
On iPhone, you can reset your data statistics to get accurate tracking: Settings then Cellular then scroll to the bottom then Reset Statistics. Do this right before you start using the eSIM and it'll track from zero.
Bonus: eSIM working but apps say "no internet"
Sometimes your eSIM is connected and working, but specific apps claim there's no internet. This usually happens because those apps are still associated with your home SIM's cellular permissions. Go to Settings then Cellular and make sure the apps that aren't working have permission to use mobile data on the eSIM line. On some phones, you need to grant data access per-app per-SIM.
Prevention is better than troubleshooting
The best way to avoid these issues is preparation. Install your eSIM at home on WiFi. Enable data roaming before you fly. Set the eSIM as your data line in settings. Screenshot your QR code and save your provider's support contact. Do a test by toggling airplane mode and checking the eSIM connects to your home network. Five minutes of setup at home prevents 30 minutes of stress at the airport.
Still stuck? Contact our support team and include your ICCID number (found in your account). We typically respond within a few hours.