How to Turn On Data Roaming: iPhone & Android
In short, here's what you'll discover in this article: how to turn on data roaming on iPhone, Samsung and Android, when it is actually useful, what to check before you travel, and how to stay connected abroad without letting roaming costs get out of control.
What data roaming does, in plain English
Data roaming lets your phone use mobile internet on a network that is not your usual carrier’s network. This usually happens when you travel abroad, but it can also happen near borders or in remote areas where your carrier relies on a partner network.
Turning it on does not automatically mean your phone will always connect. You still need an active mobile plan, coverage in the country, and a SIM or eSIM line that is allowed to roam. Apple explains that roaming gives internet access over a cellular data network when you are outside your carrier’s own coverage area, while carriers decide whether your plan includes it or charges extra.
That is why the best answer is not simply “switch it on.” It is: turn it on only for the line you want to use, then check the cost and the data limit before you start using maps, video calls or hotspot.
Before you turn on data roaming: 5 quick checks
Before touching the switch, take one minute to check the basics. It can save you from the most common travel problem: data works for five minutes, then stops or becomes expensive.
- Check your carrier plan: some plans include roaming, others bill it separately.
- Confirm the right SIM line: if you use dual SIM or an eSIM, select the travel line, not your home line by mistake.
- Disable automatic downloads: cloud backups, app updates and photo sync can burn data fast.
- Know your destination rules: roaming inside a regional zone can differ from roaming outside it.
- Keep Wi-Fi available for setup: install or activate a travel eSIM before leaving the airport if possible.
💡 If you are using a travel eSIM, activate the eSIM profile first, then enable roaming on that eSIM line only if the provider’s instructions require it.
How to turn on data roaming on iPhone
On iPhone, the wording can vary slightly depending on your carrier and iOS version. The general path is simple.
- Open Settings.
- Tap Cellular or Mobile Service.
- If you use more than one SIM or eSIM, choose the line you want to use abroad.
- Tap Cellular Data Options.
- Turn Data Roaming on.
If you use an eSIM for travel, also check which line is selected for mobile data. A common mistake is installing the travel eSIM, then leaving mobile data on the home SIM. In that case, roaming may work, but not on the line you intended.
Apple’s official guidance on cellular data roaming options for iPhone and iPad also recommends contacting your carrier to confirm whether your plan includes roaming. For eSIM travel, Apple notes that international roaming with an eSIM works like roaming with a physical SIM, but your iPhone must not be carrier-locked if you want to use another provider.
For a more detailed iPhone walkthrough, read our dedicated guide: How to Turn On Data Roaming on iPhone.
How to turn on data roaming on Samsung and Android
Android menus vary by brand, but the logic is almost always the same: open mobile network settings, choose the SIM, then enable roaming.
| Phone type | Typical path | What to verify |
|---|---|---|
| Samsung Galaxy | Settings → Connections → Mobile networks → Data roaming | The active SIM or eSIM is the travel line |
| Google Pixel | Settings → Network & internet → SIMs → choose SIM → Roaming | Mobile data is enabled for the same SIM |
| Other Android phones | Settings → Mobile network or SIMs → Data roaming | Carrier plan and preferred network are correct |
On Samsung, you can use our step-by-step guide here: How to Switch On Data Roaming on Samsung. On Pixel, Google groups roaming under mobile network settings, alongside mobile data and preferred network options.
⚠️ If your Android phone has two SIM lines, do not enable roaming blindly for both. Choose the line you want to pay with. If your home carrier charges roaming fees, leave roaming off on that line and use your travel eSIM instead.
Should data roaming be on or off?
The safest default at home is usually off. When you travel, the right answer depends on the line you are using.
Turn data roaming on when your carrier includes roaming, when your travel pass requires it, or when your travel eSIM instructions say it must be enabled. Many travel eSIMs need roaming turned on because they connect through partner networks in the destination country.
Keep data roaming off when you are unsure about fees, when your home line is not covered by an international plan, or when you only want to use Wi-Fi. This is especially important near borders, on ferries, or in airports where your phone can connect to an unexpected partner network.
To go deeper on costs and the difference between mobile data and roaming, read our guide: Data Roaming Defined: Meaning, Costs and eSIM Tips.
Using an eSIM to make roaming safer
An eSIM can make roaming easier to control because you can separate your home number from your travel data. Keep your main SIM active for calls or messages if needed, then use the eSIM for mobile internet abroad.
Before buying, check whether your phone supports eSIM. If you are not sure, use our compatibility checker.
Is your phone eSIM-compatible?
Check the full list of compatible smartphones: iPhone, Samsung, Google Pixel and 200+ models.
Check compatibilityOnce you know your phone is compatible, compare travel eSIM providers that fit your destination, trip length and data habits. MyBestSim prioritizes providers such as Roamic, Yesim, abesteSIM, Jetpac and eSIM-On Shop when they are relevant, because they offer traveler-focused eSIM options and frequently support promotional offers through our platform.
💡 For short city breaks, a smaller data plan can be enough if you mostly use maps, messaging and ride apps. For hotspot, remote work or frequent video, choose more data and monitor usage from day one.
Troubleshooting: data roaming is on but internet does not work
If roaming is enabled but your phone still has no data, work through the problem in this order. Do not reset everything first; most issues are simpler.
- Toggle airplane mode for a few seconds, then turn it off.
- Restart the phone after installing a new eSIM.
- Check the selected data line in dual-SIM settings.
- Try automatic network selection first, then manual selection if your provider recommends a specific network.
- Check APN settings only if your eSIM provider gives exact APN instructions.
- Confirm the plan is active and that the destination country is covered.
⚠️ Avoid deleting an eSIM profile unless the provider tells you to. Some eSIMs can be installed only once. If you delete the profile, you may need support to issue a replacement.
Quick setup checklist before leaving the airport
Use this checklist as soon as you land. It is quick, practical and prevents most roaming mistakes.
| Step | Goal | Good sign |
|---|---|---|
| Choose the data line | Use the right SIM or eSIM for internet | The travel line is selected for mobile data |
| Enable roaming | Allow access to partner networks | Signal bars appear with a local network name |
| Test a light page | Confirm data works before leaving Wi-Fi | A web page loads without airport Wi-Fi |
| Limit background data | Protect your allowance | Backups and app updates are paused |
If you travel to a country where roaming charges are a known risk, it is worth reading a destination-specific guide before departure. For example, here is our guide on avoiding extra data roaming charges in Turkey.
FAQ
Do I need data roaming on for an eSIM?
Often, yes. Many travel eSIMs connect through partner networks, so the eSIM line may need data roaming enabled. Always follow the provider’s activation instructions and enable roaming only on the travel eSIM line if your home line could be charged extra.
Will turning on data roaming charge me immediately?
Not necessarily. Charges depend on your carrier, plan and destination. Turning on the switch allows roaming; it does not define the price. Check your carrier terms or use a travel eSIM with a clear prepaid data allowance.
Why does my phone say roaming in my own country?
Your phone may be using a partner network because your carrier has limited coverage in that area. It can also happen near borders. If you are unsure, contact your carrier before using heavy data.
Should I turn off my home SIM when using a travel eSIM?
You do not always need to turn it off. Many travelers keep the home SIM active for calls or SMS, but set mobile data to the travel eSIM. For maximum cost control, disable data roaming on the home SIM.
What is the fastest way to check if roaming works?
Turn off Wi-Fi, open a lightweight web page, and check whether it loads on mobile data. Then verify that the active data line is the one you intended to use.
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. 🌍📲