Your Montenegro eSIM is installed successfully, but you still don’t have internet? Don’t worry—most eSIM issues can be solved in just a few minutes without contacting customer support.
Whether you’re arriving at Podgorica Airport, landing in Tivat, exploring Kotor or relaxing in Budva, this guide covers the most common reasons why a travel eSIM may not work and how to fix them.
Quick answer: most Montenegro eSIM problems are caused by Data Roaming being disabled, the wrong SIM being selected for Mobile Data, incorrect APN settings or attempting to use the eSIM before arriving in Montenegro.
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Check these four items first. In many cases, they solve the problem immediately.
| Item | Should Be |
|---|---|
| eSIM Installed | Yes |
| Mobile Data | Montenegro eSIM |
| Data Roaming | ON |
| Network Selection | Automatic |
Problem 1: No Signal
If your phone shows no signal at all, try the following steps.
- Restart your phone.
- Make sure the Montenegro eSIM is turned ON.
- Turn Airplane Mode on for 30 seconds.
- Turn Airplane Mode off again.
- Wait a few minutes.
If you have only just arrived in Montenegro, the phone may need a short time to register on a supported local network.
Problem 2: Signal but No Internet
If you have signal bars but websites and apps do not load, the issue is usually related to your mobile data settings.
Check that:
- The Montenegro eSIM is selected for Mobile Data.
- Data Roaming is enabled.
- Your APN is correct.
- Mobile Data is turned on.
Problem 3: Data Roaming Is Disabled
This is the most common reason why travel eSIMs do not work.
Although roaming is often disabled to avoid unexpected charges with your home operator, travel eSIMs typically require Data Roaming to be enabled on the eSIM line.
Make sure you enable roaming only for your Montenegro eSIM, not necessarily for your primary SIM.
Problem 4: Wrong SIM Selected for Mobile Data
Many Dual SIM phones continue using the primary SIM for internet after the eSIM has been installed.
Open your SIM settings and verify that your Montenegro eSIM is selected as the Mobile Data line.
| Setting | Recommended Value |
|---|---|
| Mobile Data | Montenegro eSIM |
| Calls | Primary SIM |
| SMS | Primary SIM |
| Automatic Data Switching | OFF |
Problem 5: Incorrect APN
Most phones configure APN settings automatically. If they don’t, enter the APN manually.
| Field | Value |
|---|---|
| APN | data.esim |
| Username | Leave blank |
| Password | Leave blank |
| Authentication | None |
Problem 6: Manual Network Selection
If your phone is set to a network that is unavailable, your eSIM may not connect.
Open Network Selection and choose Automatic. Your phone will connect to a supported partner network.
Problem 7: You Are Not Yet in Montenegro
Many travel eSIMs activate only after connecting to a supported mobile network in Montenegro.
If you’re still in another country, your eSIM may remain inactive until you arrive.
Problem 8: Carrier-Locked Phone
If your phone was purchased through a mobile operator, it may be carrier locked.
A carrier-locked device may prevent travel eSIMs from working even if the phone supports eSIM technology.
Problem 9: eSIM Was Deleted
Do not remove your eSIM after installation unless customer support specifically instructs you to do so.
Deleting an eSIM often removes the installed profile permanently.
Recommended Phone Settings
| Setting | Recommended Value |
|---|---|
| Mobile Data | Montenegro eSIM |
| Primary SIM | Calls and SMS |
| Data Roaming | ON |
| Network Selection | Automatic |
| Automatic Data Switching | OFF |
| APN | data.esim |
Step-by-Step Troubleshooting Checklist
- Restart your phone.
- Check that the eSIM is turned ON.
- Select the eSIM for Mobile Data.
- Enable Data Roaming.
- Verify the APN is data.esim.
- Turn Airplane Mode on for 30 seconds.
- Turn Airplane Mode off.
- Leave Network Selection on Automatic.
- Wait several minutes for network registration.
Does WhatsApp Still Work?
Yes. Your WhatsApp account remains linked to your existing phone number.
If mobile data starts working, WhatsApp will automatically reconnect without requiring a new account.
Can You Keep Your Home SIM?
Yes. Most Dual SIM smartphones allow you to keep your regular SIM active while using your Montenegro eSIM for internet.
- Receive calls.
- Receive SMS verification codes.
- Use the Montenegro eSIM for mobile data.
- Keep your existing phone number.
Coverage in Montenegro
If you’re travelling through mountainous areas, temporary signal loss can occur.
| Location | Coverage |
|---|---|
| Podgorica | Excellent |
| Budva | Excellent |
| Kotor | Excellent |
| Tivat | Excellent |
| Herceg Novi | Very Good |
| Bar | Very Good |
| Ulcinj | Very Good |
| Durmitor National Park | Variable |
| Tara Canyon | Variable |
| Lovćen National Park | Variable |
Common Mistakes
- Installing the eSIM after arriving instead of before travel.
- Leaving Data Roaming disabled.
- Selecting the wrong SIM for Mobile Data.
- Deleting the eSIM profile.
- Using manual network selection.
- Forgetting to restart the phone.
- Using a carrier-locked device.
When Should You Contact Support?
If you’ve completed every troubleshooting step and your eSIM still does not connect, contact customer support with the following information:
- Your phone model.
- Your current location.
- A screenshot of your SIM settings.
- A screenshot showing the APN settings.
- A screenshot of the Mobile Data settings.
Related Montenegro Guides
- Montenegro eSIM
- How to Install a Montenegro eSIM
- How to Activate a Montenegro eSIM
- How to Use an eSIM in Montenegro
- APN Settings for Montenegro eSIM
- Montenegro eSIM for iPhone
- Montenegro eSIM for Android
- Does My Phone Support eSIM?
FAQ
Why is my Montenegro eSIM connected but I have no internet?
The most common causes are Data Roaming being turned off, the wrong SIM being selected for Mobile Data or an incorrect APN.
Do I need Data Roaming enabled?
Yes. Most travel eSIMs require Data Roaming to be enabled.
What APN should I use?
If manual setup is required, use data.esim.
Can I restart my phone?
Yes. Restarting your phone is often one of the quickest ways to reconnect to the network.
Will WhatsApp still work?
Yes. Once mobile data is restored, WhatsApp reconnects automatically using your existing phone number.
Should I delete and reinstall my eSIM?
No. Do not delete your eSIM unless customer support specifically instructs you to do so.
Final Recommendation
Most Montenegro eSIM issues can be solved by checking your phone settings. Make sure your eSIM is selected for Mobile Data, enable Data Roaming, verify the APN is data.esim, leave Network Selection on Automatic and restart your phone if necessary. With the correct settings, your eSIM should connect and provide reliable mobile internet throughout Montenegro.