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Check What Is Causing the Problem
International roaming can stop working for several reasons. Before making changes, it helps to identify the most likely cause. The issue may be on your carrier’s side, in your device settings, or related to the local network you are trying to connect to.
Start by observing basic symptoms. Do you see any signal bars? Does the phone show a network name or an “Emergency calls only” message? Is mobile data working but calls are not, or vice versa? The answers will guide which fix to try first.
Keep in mind that some carriers require you to activate roaming before you travel. Others may block data roaming by default on certain plans. A quick check with your carrier’s support page or app can save time.
Fixes to Try in Order
These steps are arranged from the simplest and safest to more involved actions. Try them in order, testing service after each one.
1. Restart Your Phone
A simple restart resolves many temporary network and software glitches. Turn your device off, wait about 30 seconds, and turn it back on. Once the phone boots up, it will re-register with the local network. This often re-establishes roaming service without any other changes.
2. Enable Data Roaming and Verify Network Settings
On most smartphones, data roaming is turned off by default to avoid unexpected charges. If you have a roaming plan or know your carrier’s rates, you need to enable this setting.
On an iPhone, go to Settings > Cellular > Cellular Data Options and turn on Data Roaming. On Android, go to Settings > Connections (or Network & Internet) > Mobile Networks and toggle Data Roaming on. The exact wording may vary by device and Android version. Also check that your network mode is set to automatic selection of the preferred network type (4G/LTE or 5G, depending on your device).
3. Manually Select a Network
If your phone is not connecting to any local network automatically, you can try choosing one manually. This is especially useful in areas where the automatic selection fails or picks a weak signal.
On iPhone, go to Settings > Cellular > Network Selection and turn off Automatic. Wait for the list of available networks to appear, then tap one. On Android, go to Settings > Connections > Mobile Networks > Network Operators (or Carrier) and tap Search Networks. Select a network from the list. If you get an error, try a different one. Once connected, test calls and data.
4. Toggle Airplane Mode
This forces the phone to disconnect and reconnect to all networks, which can refresh the connection to the roaming network. Turn on Airplane Mode from the quick settings panel, wait 30 seconds, then turn it off. Your phone will search for available networks again. If roaming was enabled but still not working, this can sometimes trigger a successful registration.
5. Remove and Reinsert the SIM Card
A loose or slightly misaligned SIM card can cause network registration issues, especially when the phone tries to connect to a foreign network. Power off the device, locate the SIM tray, remove the SIM card, inspect it for any visible damage or dirt, and reinsert it firmly. Power the phone back on and check for service.
If your device uses an eSIM, this step does not apply. Instead, you can try disabling and re-enabling the eSIM line in the settings. On iPhone, go to Settings > Cellular and tap the eSIM plan, then toggle it off and on. On Android, the exact steps vary, but look for a similar option under SIM Card Manager or Mobile Networks.
6. Reset Network Settings
This step clears saved Wi-Fi networks, Bluetooth pairings, and previous cellular settings, but it does not erase personal data like photos or apps. It can resolve deeper configuration conflicts that prevent roaming.
On iPhone, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. On Android, the path is usually Settings > General Management > Reset > Reset Network Settings (or Reset Mobile Network Settings). After the reset, the phone will restart. You will need to re‑enter Wi‑Fi passwords, and you may need to re‑enable data roaming and manually select a network again.
7. Verify Carrier Roaming Agreements and Account Status
If none of the above steps work, the problem is likely not on your device. Contact your carrier’s customer support to confirm that international roaming is active on your account, that your plan includes roaming in the country you are in, and that there are no billing blocks or data caps that could be preventing service. Some carriers require you to enable roaming through their website or app before you leave, or may have a separate roaming pass that needs to be purchased.
Also ask if your carrier has a roaming partner in your current location. Even if your phone shows a signal, data may be blocked if the carrier does not have a proper agreement with the local network. In some cases, the carrier may need to refresh your connection on their end, which can usually be done within minutes.
If the Problem Continues
After trying all seven fixes, if roaming still does not work, consider the following possibilities:
- Software update: Make sure your phone is running the latest available operating system. Carrier settings updates are sometimes delivered via system updates.
- APN settings: For data roaming, incorrect APN settings can block connectivity. Your carrier can provide the correct APN details. These are usually found in the mobile network settings under “Access Point Names.”
- Hardware issue: A faulty SIM card, damaged SIM tray, or network radio problem could prevent roaming. Test with a different SIM card if possible, or visit a local carrier store.
- Local network restrictions: Some countries or specific networks may block certain services (e.g., VoLTE, Wi‑Fi Calling) for roaming users. This is generally beyond your control.
If you are still unable to restore service, ask your carrier to escalate the issue or consider purchasing a local prepaid SIM card or an eSIM data plan as a temporary alternative.
Frequently Asked Questions
Why is my phone showing “No Service” when I’m abroad?
This usually means the phone cannot find any compatible network. Causes include roaming not being enabled on your account, airplane mode being on, or the device being locked to a specific carrier. Try the steps above, especially the manual network selection and restart.
Do I need to enable data roaming for calls and texts?
For standard voice calls and SMS, data roaming is not required. However, if you use services that rely on data (like WhatsApp calls, iMessage, or visual voicemail), you will need data roaming enabled. For basic calls and texts, only voice roaming needs to be active on your account.
Will resetting network settings erase my data?
No. Resetting network settings clears saved Wi‑Fi networks, Bluetooth connections, and cellular settings, but it does not remove your photos, apps, contacts, or other personal files. You will need to re‑enter Wi‑Fi passwords and re‑configure any VPN or APN settings after the reset.
Can I use Wi‑Fi Calling while roaming?
Many carriers support Wi‑Fi Calling while roaming, but it depends on your carrier and plan. If enabled, you can make calls over Wi‑Fi even when cellular signal is weak. Check with your carrier for compatibility and any additional charges.
