eSIM Not Working Abroad? 8 Fixes to Try Before You Panic

If your eSIM is not working abroad, the cause is almost always a setting rather than a faulty plan. The usual culprits are the wrong line selected for mobile data, the travel line switched off, or data roaming turned off for the eSIM. The checks below take a few minutes and fix most problems.

In short:

• Make sure the travel eSIM is switched on and chosen for mobile data.
• Turn data roaming on for the travel line, and keep it off on your home line.
• Restart the phone, then try selecting the local network manually.
• Confirm your plan covers the country you are in, and contact support if nothing helps.

Before you start: what “not working” really means

“My eSIM is not working” can describe three different situations, and each points to a different fix.

• No signal at all. The phone shows “No Service” or “Searching”. This is usually a network, location or line-on/off issue.
• Signal but no internet. The signal bars look fine, but pages will not load. This is most often a data line or data roaming setting.
• Never connected since you arrived. Many travel eSIMs, Roamy’s included, start their validity when they first connect to a supported network at your destination. Until you land and the phone finds a network, nothing is wrong with the plan.

Work out which one you have, then go through the fixes below in order.

1. Check the eSIM line is on

An eSIM that is installed is not necessarily switched on. On an iPhone, open Settings, then Mobile Service (or Cellular), and make sure the travel line is turned on. On an Android phone, look in Settings under Network and internet, then SIMs, and check that the eSIM is enabled.

If you have more than one line on your phone, it is easy to leave the travel one off after installing it at home to avoid roaming on the way to the airport. Switch it on once you land.

2. Choose the right line for mobile data

Your phone can use only one line for mobile data at a time. Apple’s dual SIM guidance says to check the selected line under Settings, Mobile Service, Mobile Data. If your home SIM is still selected, your phone will try to use that for data, which is exactly what you do not want abroad.

Set the Roamy line as your mobile data line. Your usual SIM can stay on for calls and texts, because Roamy plans are data-only and do not touch your number.

Watch for automatic data switching

Some phones have an option that lets the other line take over data in certain situations, such as during a call. Apple describes this as Allow Mobile Data Switching. It is useful at home, but if your phone keeps flipping to the home line abroad, switch it off while you travel.

3. Turn data roaming on for the travel line

This is the most common fix. A travel eSIM connects to partner networks in the country you are visiting, so the phone treats it as roaming. Open the settings for the travel line and switch data roaming on.

Do this for the travel line only. On your home line, keep data roaming off, so that the phone cannot quietly use your home network’s roaming rates in the background.

4. Toggle airplane mode, then restart

It sounds basic, but it works because it forces the phone to search for networks again. Turn airplane mode on for ten seconds, then turn it off. If the phone still shows nothing, do a full restart.

This helps most often right after landing. Phones sometimes hold on to a network search from the departure country, or fail to register on the first attempt in a busy arrivals hall.

5. Select the local network manually

By default your phone picks a network automatically, and occasionally it picks one that is not part of your plan or that has weak coverage in your spot. Roamy’s destination pages list the local networks for each country and the fastest network type, so you know what to look for.

To pick one yourself:

1. Open the settings for the travel line and find Network Selection (iPhone) or Network operators (Android).
2. Turn off the automatic option.
3. Wait for the list to appear, which can take a minute, and choose one of the networks listed for your destination.

If one network gives you no service, try another from the list. Switch back to automatic once you are connected, so the phone can move between networks as you travel.

6. Check your plan covers where you are

Plans are tied to the countries they list. A single-country plan will not carry over a border, and a regional or global plan covers a set list of countries, so check that the one you are standing in is on it.

This catches people on multi-country trips. If you hop from one country to the next, check the coverage list for every stop, not just the first. A ferry or a train crossing a border can put you on a network the plan does not include.

If you are still planning the trip, our guide to how much data you need abroad helps you choose between plan sizes.

7. Move to a better spot

Signal problems are not always settings problems. Basements, metro platforms, the middle of large buildings and some airport terminals have poor coverage on any network. Step outside, or move near a window, and give the phone a minute.

In remote areas such as mountains, deserts or the open sea, coverage can be limited whichever plan you use. Roamy uses local partner networks, so coverage follows what those networks offer where you are.

8. Do not delete the eSIM yet

When something does not work, deleting the eSIM and starting again can feel like the obvious step. Avoid it until the other checks are done. An eSIM profile is usually meant to be installed once, and removing it can leave you unable to reinstall it from the original code. It also removes your best clue about whether the problem is the install, the activation or the network.

If you are not sure what is installed, look at the list of lines in your phone settings first. Our guide on when to install your eSIM explains the setup, and the help centre covers reinstalling if you do need to.

When to contact support

If you have worked through all eight steps and still have no data, it is time to ask for help. Have these to hand:

• The country and the town you are in.
• What your phone shows: “No Service”, signal bars but no internet, or a specific message.
• Which of the checks above you have already tried.

Roamy support is available on WhatsApp or at support@roamyesim.com. If an eSIM cannot be issued after payment, it is refunded, and in most cases that happens automatically.

How to avoid the problem next time

A few habits prevent most of these issues:

• Install at home on Wi‑Fi. It takes about a minute, and you can fix any install problem before you travel. On an iPhone with iOS 17.4 or later, it is one tap in the app; otherwise use the QR code or manual code.
• Check your phone is unlocked and eSIM-compatible before you buy. Our guide to checking eSIM compatibility shows how.
• Turn the settings on in the right order when you land: travel line on, data line set to the eSIM, data roaming on for the travel line, data roaming off for the home line.
• Know your coverage list if you are using a regional or global plan.

Get connected with Roamy

Roamy plans are data-only, so your own SIM keeps your number while the eSIM handles data. Plans for Europe start from $1.90, and you can see every option on the eSIM page. Not sure how it all fits together? How it works takes you through it step by step.