How to Switch On Data Roaming on Samsung

In short, here's what you'll discover in this article: how to switch on data roaming on Samsung, what to check if the option is greyed out, and how to stay connected abroad without letting roaming charges surprise you.

On a Samsung Galaxy phone, data roaming lets your mobile plan use partner networks abroad. It is useful when you land in another country, but it can also trigger extra charges if your home plan is not travel-friendly.

The good news: the setting is easy to find. The better news: you can combine it with a travel eSIM to keep more control over your mobile data.

Quick answer: where is data roaming on Samsung?

To switch on data roaming on most Samsung Galaxy phones, open Settings, then go to Connections, choose Mobile networks, and enable Data roaming. Samsung’s own support page confirms this path for Galaxy devices: Settings → Connections → Mobile networks → Data roaming.

Here is the simple flow to remember before you travel:

Mobile data must be turned on first.
Data roaming must be enabled for the SIM or eSIM you want to use abroad.
The right SIM must be selected if your Samsung has dual SIM or eSIM.
Your plan must include roaming, or you may pay extra.

⚠️ Turning on data roaming does not make roaming free. It only allows your phone to connect to mobile data outside your usual network area.

How to switch on data roaming on a Samsung Galaxy

Use these steps on Samsung Galaxy S, Z, A and most recent Galaxy models. The wording can vary slightly by Android or One UI version, but the route is usually the same.

Step-by-step instructions

Open the Settings app.
Tap Connections.
Tap Mobile networks.
Turn on Data roaming.
If you use two SIMs, check that roaming is enabled for the SIM or eSIM you actually want to use.

After this, your Samsung should be able to use mobile data when it connects to a supported partner network abroad. If nothing happens, wait a minute, then toggle airplane mode on and off. This often forces the phone to search for a fresh network connection.

💡 Before your flight, take a screenshot of the path above. It is easier to fix roaming settings in the airport than after landing with no connection.

What to check before turning data roaming on

Data roaming is a setting, not a plan. So, before enabling it, check what your carrier will charge. Some plans include roaming in selected countries. Others bill by day, by zone, or by data used.

What to check	Why it matters	Best action
Roaming included in your plan	Your home carrier may charge extra abroad	Check your carrier app before departure
Destination coverage	Roaming zones change by country	Confirm the country is included
Dual SIM selection	Your phone may use the wrong SIM for data	Select the travel SIM or eSIM for mobile data
Data limit	Background apps can use data silently	Set a data warning and disable heavy apps

If you are unsure about the cost, read our guide to what data roaming means and how it affects travel data. It explains the difference between roaming, mobile data and eSIM plans in plain language.

Data roaming greyed out on Samsung: how to fix it

If the Data roaming switch is greyed out, mobile data is often turned off. Samsung notes that you may need to enable mobile data first. Go to Settings → Connections → Data usage, then turn on Mobile data. After that, return to Mobile networks and try the Data roaming toggle again.

If it still does not work, check these points:

Restart the phone, especially after inserting a SIM or installing an eSIM.
Turn airplane mode on and off to force a network refresh.
Check SIM manager and make sure the right SIM is selected for mobile data.
Update your phone if a pending One UI or Android update is available.
Contact your carrier if roaming is blocked on your plan.

⚠️ Do not enable roaming and start downloading maps, videos or cloud backups immediately. Test with a light page first, then monitor your data use.

Using a travel eSIM on Samsung: the safer setup

Many travellers use a travel eSIM instead of relying only on their home carrier’s roaming. On a compatible Samsung Galaxy, this gives you a separate data plan for your trip, while your regular SIM can stay available for calls, texts or banking verification.

The safest setup is usually this:

Install the travel eSIM before departure.
Keep your main SIM active for calls or SMS if needed.
Set the travel eSIM as your mobile data line.
Enable data roaming only where the eSIM provider requires it.
Disable background data for heavy apps before landing.

✅ This setup helps you avoid accidentally using your home carrier’s roaming data when you meant to use your travel eSIM.

Check if your Samsung supports eSIM

Not every Samsung model supports eSIM. Many recent Galaxy S, Z and selected A models do, but the exact support depends on the model, market and carrier configuration. If you plan to use a travel eSIM, check compatibility before buying.

Use our compatibility checker before you travel:

Is your phone eSIM-compatible?

Check the full list of compatible smartphones: iPhone, Samsung, Google Pixel and 200+ models.

Check compatibility

If your Samsung is compatible, you can then choose a provider that fits your trip length, destination and data habits. Our recommended eSIM providers include travel-focused options such as Voye, eSIMPal, 9esim, Yesim and abesteSIM, depending on coverage and availability.

How to avoid surprise roaming charges on Samsung

Switching on data roaming is convenient, but the real skill is controlling what happens next. The most expensive roaming mistakes usually come from background data, automatic uploads, or choosing the wrong SIM for mobile data.

Before you leave, do these checks:

Download offline maps for your destination.
Disable cloud photo backup on mobile data.
Turn off app auto-updates outside Wi‑Fi.
Set a mobile data warning in Samsung settings.
Use Wi‑Fi for large files, streaming and video calls when possible.

For real-world examples of how roaming can become expensive, read our breakdown of a major vacation roaming charge. It shows why a few minutes of checking settings can protect your travel budget.

When should you turn data roaming off again?

Turn data roaming off when you no longer need mobile data outside your normal network, or when your travel eSIM expires. This prevents your phone from connecting in the background after your trip, during a layover, or near a border.

To switch it off, use the same route: Settings → Connections → Mobile networks → Data roaming. Then turn the toggle off. If you use an eSIM only for travel, you can also disable that eSIM in SIM manager until your next trip.

💡 If you travel often, create a small “arrival checklist” in your notes app: choose the right SIM, enable roaming if needed, test data, then check data usage after one hour.

FAQ

How do I turn on data roaming on Samsung?

Open Settings, tap Connections, choose Mobile networks, then enable Data roaming. If you use dual SIM or eSIM, make sure the correct SIM is selected for mobile data.

Why is data roaming greyed out on my Samsung?

The most common reason is that mobile data is turned off. Enable Mobile data first, then return to Mobile networks and try the Data roaming switch again.

Should data roaming be on or off when using a travel eSIM?

It depends on the eSIM provider. Some travel eSIMs need data roaming enabled to connect to partner networks. The key is to set the travel eSIM as your mobile data line, not your home SIM.

Will turning on data roaming cost money?

It can. The setting itself does not charge you, but using mobile data abroad may trigger roaming fees if your plan does not include that destination. Check your carrier or use a travel eSIM to control costs.

Can I keep calls on my normal SIM and data on an eSIM?

Yes, on many dual SIM Samsung phones. In SIM manager, keep your normal SIM active for calls or texts, then select the travel eSIM for mobile data.

Etienne

Passionate about travel and tech, I have combined these two worlds to help travelers understand the numerous options to get Internet access abroad and identify the best option for them. As a software development engineer, I put my skills at the service of simple, practical and transparent content. My goal is to give you all the keys to stay connected easily and at the best price during your trips. 🌍📲