Traveling abroad is often accompanied by the need to stay connected, and for owners of Xiaomi, Redmi or Poco smartphones, this issue becomes especially urgent.Roaming is not just a single button activation, but a comprehensive setup that allows your device to register with foreign carriers. Without the right configuration, you risk being left without Internet or, even worse, receiving a huge bill for incoming calls.
Modern MIUI and HyperOS shells offer flexible mobile traffic management tools, but standard settings can be hidden or have features in different regions of the firmware. International roaming on Xiaomi is activated through the system menu, but stable operation often requires manual configuration of access points. In this article, we will discuss all the steps, from basic activation to solving complex network registration problems.
Before you start setting up, make sure your SIM-The card supports work abroad, the service must be connected to your carrier, and the balance must be funds. If you ignore this stage, no manipulation of the smartphone menu will not help to get online.
Activation of the service by the communications operator
The first and most important step is to check the status of the service with your mobile operator. Xiaomi smartphone is only a signal reception tool, and if the "permission" is not given on the provider side, the phone will not be able to register with the foreign network. Often users try to include the feature in the menu, forgetting that the tariff plan itself can block such connections by default.
For activation, it is usually enough to send USSD-Each provider has its own codes, so it's better to save them in advance or check them in your personal account. It only takes a couple of minutes, but it saves troubleshooting hours at the airport.
⚠️ Warning: Make sure that your account has enough funds for your daily roaming subscription fee, otherwise the operator may block the service at the most inopportune time.
Once the operator confirms that the service is connected, you can go directly to the device settings. If the service is not activated, the phone will show the status of "Emergency Calls Only" or simply "No Network", even if the slider in the settings is turned on.
Roaming enabled in MIUI and HyperOS settings
Shell interface MIUI It may vary slightly depending on the Android version and the region, but the logic remains the same. SIM-This is where the basic switching between the available networks takes place, and it's important to understand the difference between data roaming and just roaming, although in modern software versions these concepts are often combined into a single switch.
Find the section with settings SIM-The path may look like settings. → SIM-If you have a dual-sym phone, choose the card you plan to use abroad. In some versions of the firmware for the countries of the Eurasian Economic Union (EEU), this option can be hidden or renamed.
Activate the data roaming switch. The system will issue a cost warning. This is a standard security measure. Once confirmed, the phone will start searching for available networks. If the automatic choice does not work, you will have to manually select the operator through the Network Selection menu.
☑️ Checklist before departure
Sometimes, when the function is turned on, you need to restart the device, which helps the Qualcomm or MediaTek communication module re-enter the new network, and do not ignore the reboot if the network indicator flashes for a long time or shows the status of “Connection”.
Manually configuring APN access points
A common problem is that voice roaming is not connected, which means that the phone is logged in, but doesn't know which gateway to send data through, and the solution is to set up APNs (Access Point Name) that your home carrier provides for overseas operations.
To get into the settings menu, go down the Settings path. → SIM-maps and mobile networks → (Choose. SIM) → Access points (APN). Here you'll see a list of existing profiles, you'll need to create a new one or edit the current one. Usually, just click on the plus or the New Access Point button».
In the menu that opens, you need to enter the parameters obtained from the operator. Most often, you need to fill in the fields "Name" and "APN." The remaining fields can be left empty or by default. After entering the data, be sure to save the profile (button "More" → "Save") and activate it by placing a dot next to the name.
| Parameter | Meaning | Description |
|---|---|---|
| Name. | Roaming_Internet | Arbitrary name for convenience |
| APN | internet.mts.ru | Access Point (depending on operator) |
| Type APN | default,supl | Type of connection (usually by default) |
| Protocol | IPv4/IPv6 | Recommended standard |
⚠️ Attention: Do not reset the settings APN to the factory, if you do not have accurate data from the operator at hand, as this can completely turn off mobile Internet.
What to do if the APN is not saved?
Features of Chinese versions of smartphones
Owners of devices imported from China (CN Version) often face the lack of a roaming switch in the standard menu, which is because in China this feature is not needed, and Xiaomi engineers simply hide it in global firmware assembled for the domestic market, but the solution exists and does not require reflashing.
To activate the hidden menu of engineering tests, use the standard command set. Open the Phone app and dial the code ##4636##. If the code doesn't work, your version of the shell may block this access, and then you will need to install a special application-caller or use the code. ADB-team.
From the menu that opens, select Phone Information. Find Set Preferred Network Type. You can select a roaming-enabled mode, such as LTE/TD-SCDMA/GSM or the same one marked roaming. You may also need to enable the Data Roaming option right on this menu if it is available.
adb shell settings put global mobile_data_roaming 1This command, via ADB (Android Debug Bridge), compulsorily enables system-level data roaming, and is especially useful when the GUI is unresponsive or hidden. Once you execute the command, restart the device to apply the changes.
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Use the “Engineering Mode MTK” or “Xiaomi Engineering Mode” app from Google Play if the standard code doesn’t work on your model.
Solving problems with registration on the network
It's not uncommon for a phone to see a network but not connect to it, and it could be due to a conflict of communication standards or a wrong choice of frequencies. First, try manually selecting an operator. → SIM-maps and mobile networks → Select the network and disable the automatic mode.
Wait until the scan is finished. The list will include available carriers. Choose the one with which your home provider has a roaming agreement. If the phone says "Refuse to register," try to select another operator from the list of partners.
Sometimes switching from 5G/LTE to 3G/2G helps push through registration on older roaming networks that do not yet support VoLTE.
- 📶 Reboot your smartphone in flight mode: turn on the flight mode for 10 seconds, then turn off.
- 🔄 Remove and insert. SIM-The card was re-wiped, wiping out the contacts.
- ⚙️ Reset network settings: Settings → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth.
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Manual operator selection often solves the problem when the automatic mode gets stuck on a weak signal or incorrect tower.
Traffic savings and data security
Using mobile internet overseas can lead to unexpected costs if you don't control background processes. Android and MIUI have built-in security mechanisms, but they need to be set up properly. Traffic limits are your best friend on the journey.
Set a limit on mobile traffic. Go to Settings. → SIM-maps and mobile networks → Traffic limit. Set a daily or monthly limit according to your tariff. When you reach the threshold, the phone will automatically turn off data transfer, saving money in the account.
Also, disable app auto-update and high-quality photo sync for mobile network. Use only Wi-Fi in a hotel or cafe for heavy tasks. This will not only save money, but also extend battery life, as finding a network in roaming is significantly energy intensive.
⚠️ Attention: Map apps and navigators can download maps in the background. Upload offline maps of the desired region in advance via Wi-Fi.
Public data security is also important: When connecting to open Wi-Fi at airports or hotels, use a VPN to protect your passwords and personal communications from being intercepted. Xiaomi's built-in VPN or third-party trusted services will help create a secure tunnel.