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eSimFLAG eSIM not working? Reasons and how to fix it
Having trouble with your eSimFLAG connection? This guide explains why your eSimFLAG eSIM might not be working and how to fix it
If you’re facing the issue of eSimFLAG not working, it’s usually caused by basic configuration errors.
Luckily, most of these problems are easy to fix, and below we’ll run you through everything you need to know to hopefully fix your problems.
If eSimFLAG still isn’t working after troubleshooting, consider switching to Holafly. With unlimited data, quick setup, and 24/7 customer support, it offers a reliable and straightforward way to stay connected away from home.
eSIMs for every destination
Get eSIMs for 200+ destinations with Holafly, keeping you connected wherever you go.
Why is my eSimFLAG eSIM not working?
When you notice your eSimFLAG not working on iPhone or Android, it usually means your phone settings or network configuration need attention.
Below are the most common causes:
- Device incompatibility or lock status. Some phones don’t support eSIMs or are locked to a specific carrier, preventing the eSimFLAG profile from activating.
- Mobile data or data roaming is disabled. Both settings must be turned on for the eSIM to connect abroad.
- Automatic network selection failure. Your phone may not automatically connect to a partner network, and you’ll need to choose one manually.
- Incorrect or outdated APN settings. eSimFLAG requires specific APN (Access Point Name) details for data to work correctly.
Keep scrolling to find step-by-step instructions to fix each of these issues.
How to fix a eSimFLAG eSIM
Whether you’re an Android or iOS user, follow the steps below to identify and resolve the most common issues preventing your eSimFLAG eSIM from connecting.
1. Check if your smartphone supports eSIMs and isn’t carrier-locked
Confirm eSIM compatibility
To do this, run a quick search, such as “Does [insert your device name] support eSIM?” Alternatively, have a look at our list of eSIM-compatible phones.
Check if your phone is carrier-locked
A carrier-locked phone will prevent the eSimFLAG eSIM from connecting to a local network.
| Device | Steps |
|---|---|
| iPhone | Settings > General > About. Scroll to “Carrier Lock.” If it says “No SIM restrictions,” your phone is unlocked. |
| Android | Settings > Connections > Mobile Networks > Network Operators and look for “Add eSIM.” If the option isn’t there, your device may be locked. |
2. Restart your phone after eSIM installation
Restarting helps your phone register the new eSIM profile correctly.
| Device | Steps |
|---|---|
| iPhone | Press and hold the Power and Volume Up buttons, then slide to power off. Wait around 10 seconds and turn it back on. |
| Android | Press and hold the Power button, select Restart, and wait for the phone to reboot before checking the connection. |
3. Turn on data roaming
eSimFLAG requires data roaming to access networks abroad. Otherwise, your phone won’t connect to the eSIM network.
| Device | Steps |
|---|---|
| iPhone | Settings > Mobile Service > [eSimFLAG eSIM] > Data Roaming > On |
| Android | Settings > Network & Internet > [eSimFLAG eSIM] > Roaming > On |
4. Enable and disable Airplane Mode
Refreshing your connection can solve temporary signal problems.
| Device | Steps |
|---|---|
| iPhone and Android | Swipe down to open Control Center (iPhone) or Quick Settings (Android). Turn Airplane Mode on for five to ten seconds, then turn it off again. Wait for the phone to reconnect. |
5. Manually select a local network in settings
If your eSimFLAG doesn’t connect automatically, manual selection can help.
| Device | Steps |
|---|---|
| iPhone | Settings > Mobile Service > Network Selection. Once there, turn off Automatic and choose a local network from the list. |
| Android | Settings > Connections > Mobile Networks > Network Operators. Then, turn off “Select Automatically,” and pick a local carrier. |
6. Update or reset your APN settings
Incorrect APN settings can block data access. Update them manually using the details below.
| Device | Steps |
|---|---|
| iPhone | Settings > Mobile Service > Mobile Data Network. Under APN, enter: Name: eSimFLAGAPN: eSimFLAGFinally, save the settings and restart your iOS device. |
| Android | Settings > Connections > Mobile Networks > Access Point Names. Then, add a new APN and enter the following:Name: eSimFLAGAPN: eSimFLAGFinally, save the settings and restart your Android device. |
7. Reset your network settings
This removes outdated configurations that might interfere with your eSIM connection. Note that this will also erase saved WiFi networks, passwords, and paired Bluetooth devices.
| Device | Steps |
|---|---|
| iPhone | Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. |
| Android | Settings > General Management > Reset > Reset Network Settings. |
If the issue persists, please contact eSimFLAG support via live chat or email for help or to request a refund.
Should your eSIM still refuse to work, consider switching to Holafly, which comes with unlimited data, easy installation, and 24/7 customer support.
Plus, we offer a mobile app compatible with iOS and Android devices.
Choose Holafly for peace of mind as you travel
Holafly is an alternative for staying connected abroad, offering a fast setup process that takes just minutes:
- Scan a QR code or install your eSIM directly through the Holafly app on iOS or Android for instant activation.
- Once activated, your data connects instantly, requiring no additional configuration.
An eSIM you can rely on
Join over 10 million Holafly customers and get connected with our trusted, global services.
With Holafly, you get unlimited data in over 270 destinations (for those looking for a long-term solution, check out our Holafly Plans), reliable high-speed coverage, and 24/7 customer support whenever you need assistance.
Travel confidently knowing your connection is taken care of with Holafly.
Disclaimer: The data in this article is accurate as of November 13, 2025, and is subject to change.
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I am a Liverpool-based SEO content specialist with years of experience crafting content that connects. I combine my love for clear communication with a passion for travel and languages (currently diving into Japanese!). At Holafly, I'm here to help you understand everything about staying connected abroad, turning technical jargon into straightforward advice you can actually use.
