Xiaomi WiFi Calling Not Working on Three Ireland

Xiaomi WiFi Calling Not Working on Three Ireland – Fix

If your Xiaomi, Redmi, or POCO device cannot use WiFi Calling (VoWiFi) on Three Ireland's network, this guide explains why and how to fix it.

Quick Answer:
WiFi Calling issues on Three Ireland with Xiaomi devices are most commonly caused by device compatibility, carrier provisioning, or missing settings. Start by checking your device model is officially supported by Three Ireland's WiFi Calling service. If it is, ensure the option is enabled in Settings → SIM cards & mobile networks. If the option is missing, try entering *#*#869434#*#* in the dialer, which may enable VoWiFi on some Xiaomi devices. If the problem persists, contact Three to verify your account is provisioned for WiFi Calling.

Check If Your Xiaomi Model Supports WiFi Calling on Three Ireland

Before troubleshooting, verify your Xiaomi device is officially supported for WiFi Calling on Three Ireland. Three Ireland maintains a list of compatible phones for WiFi Calling. At the time of writing, Three Ireland lists the following Xiaomi models as compatible:

  • Xiaomi 11 Lite 5G NE
  • Xiaomi 12 5G
  • Xiaomi 12 Lite 5G
  • Xiaomi 12T Pro 5G
  • Xiaomi 13 Lite 5G
  • Xiaomi Redmi 10 5G

Check Three's latest compatibility list before purchasing a device.

Important: Three's official support documentation notes: "If your device is supported but you didn't buy your device from Three, it may not be compatible with Three's Wi-Fi calling". This means even if your Xiaomi model is on the list, imported or non-Three devices may still not work.

Xiaomi states that most modern Xiaomi smartphones support VoWiFi in hardware, but availability depends on carrier support and regional configuration.

Can I Use WiFi Calling on an Unlocked Xiaomi?

If your Xiaomi was not purchased from Three, WiFi Calling may or may not work. This depends on several factors:

  • Firmware version – Devices running the correct EEA or Global firmware are more likely to include Three's carrier profile.
  • Carrier profile – A compatible carrier profile should be present on the device. Some imported devices may not have the necessary MBN (Modem Band) profile for Three Ireland.
  • Region-specific software – Devices intended for other markets may not receive the same carrier updates.

If your unlocked Xiaomi doesn't show the WiFi Calling option after following the steps below, Three's compatibility requirements may be the reason.

Why This Happens

Several factors can prevent WiFi Calling from working on Three Ireland with Xiaomi devices:

  • Device not officially supported – Three Ireland has a specific list of compatible phones. If your Xiaomi model isn't on the list, WiFi Calling may not work.
  • Device not purchased from Three – Even if your Xiaomi model is officially compatible, devices bought from other retailers or imported from other regions may not be compatible.
  • Missing or hidden VoWiFi settings – Xiaomi devices sometimes hide the VoWiFi option on certain carriers unless manually enabled via a carrier code.
  • Carrier provisioning issues – Your Three account may not be correctly provisioned for WiFi Calling.
  • Software version issues – WiFi Calling requires the latest software version on your Xiaomi device.
  • Carrier profile missing – Some users on Boards.ie have reported that Three Ireland's MBN (Modem Band) profile is not present on the software of some Xiaomi devices.

Does WiFi Calling Require Mobile Signal?

WiFi Calling can work with little or no indoor mobile signal, but your SIM must still be registered on Three's network and the service must be enabled on your account. In most cases, the phone needs to register with Three's IMS platform before WiFi Calling becomes available. After successful registration, calls can often continue over Wi-Fi even when indoor mobile coverage is very weak.

Enable WiFi Calling on Xiaomi – Method 1 (Settings)

Try these paths to find the WiFi Calling setting:

  1. Settings → SIM cards & mobile networks → [Three] SIM.
  2. Look for Make calls using Wi-Fi or Wi-Fi Calling.
  3. Toggle the setting ON.

Note: You must be connected to a working Wi-Fi network to access this option. Ensure your phone's operating system is up-to-date.

Enable WiFi Calling on Xiaomi – Method 2 (Carrier Code)

If the WiFi Calling option is missing from your settings, some Xiaomi devices may respond to the carrier check code:

  1. Open the Phone dialer.
  2. Enter *#*#869434#*#*.
  3. A message will appear: "VoWiFi carrier was disabled" or similar.
  4. Repeat the code to toggle the setting.
  5. Restart your phone.
  6. Check if the WiFi Calling option appears in Settings.

What this code does: This code disables Xiaomi's carrier compatibility check for VoWiFi on some devices. It may expose the WiFi Calling option, but it does not guarantee that WiFi Calling will function on unsupported networks or devices.

Note: This code may not work on all Xiaomi models or HyperOS versions.

Check Your Wi-Fi Network

Before troubleshooting your phone, ensure your Wi-Fi network is working properly:

  • Connect to a stable Wi-Fi network – WiFi Calling requires a reliable internet connection. Call quality depends on the Wi-Fi network quality and bandwidth.
  • Ensure you're in the Republic of Ireland – The service is only available in locations in the Republic of Ireland that have a WiFi network.
  • Avoid captive portals – Public Wi-Fi networks that require web login (captive portals) often block VoIP traffic and may prevent WiFi Calling from registering.
  • Check internet connectivity – Open a website in your browser to confirm the Wi-Fi network has working internet access.

Check Carrier Provisioning

Even if your device is compatible, Three must enable WiFi Calling on your account:

  • Contact Three to confirm your account is provisioned for WiFi Calling.
  • WiFi Calling is not available to all Three customers and is limited to certain devices.
  • Some accounts require WiFi Calling to be activated on the network side before the option becomes available on the phone.
  • The service is not compatible with Three Mobile Call Recording service or corporate private network service.

Test Your SIM in Another Phone

This quick test helps determine whether the issue is with your Xiaomi or your Three SIM:

  • Insert your Three SIM into another WiFi Calling-compatible phone.
  • If WiFi Calling works on the other phone, the issue is likely with your Xiaomi.
  • If WiFi Calling also fails on the other phone, the issue is likely with your Three account or provisioning.

Why Does the WiFi Calling Icon Never Appear?

If the WiFi Calling icon never appears in the status bar, possible reasons include:

  • Your device is not officially supported by Three for WiFi Calling.
  • Your account is not provisioned for WiFi Calling.
  • The carrier profile required for Three is missing on your device.
  • WiFi Calling is disabled in settings.
  • The Wi-Fi network is too slow or unstable to support VoWiFi registration.

Reset Network Settings (Last Resort)

If nothing else works, reset network settings. This removes saved Wi-Fi passwords and Bluetooth pairings, and resets all mobile network settings.

  1. Settings → Additional settings → Backup & reset → Reset phone → Reset network settings.
  2. Confirm the reset.
  3. Restart your phone.
  4. Note: You'll need to reconnect to Wi-Fi networks afterwards.

Contact Three

Contact Three if:

  • WiFi Calling still doesn't work after completing all steps above.
  • Your device is on Three's compatible list but still doesn't work.
  • You suspect a network provisioning issue with your account.

What to ask Three: Ask Three to verify that your account is correctly provisioned for WiFi Calling, confirm your device is on their compatibility list, and check whether there are any known issues with your Xiaomi model.

How to contact Three:

  • Call Three customer service
  • Visit a Three store
  • Use the My Three app

Final Verdict

WiFi Calling issues on Three Ireland with Xiaomi devices are most commonly caused by device compatibility, carrier provisioning, or missing settings. Start by checking your device model is officially supported by Three Ireland's WiFi Calling service. If it is, ensure the option is enabled in Settings → SIM cards & mobile networks. If the option is missing, try entering *#*#869434#*#* in the dialer. If the problem persists, contact Three to verify your account is provisioned for WiFi Calling.

Frequently Asked Questions

Which Xiaomi models support WiFi Calling on Three Ireland?
At the time of writing, Three Ireland lists the following Xiaomi models as compatible: Xiaomi 11 Lite 5G NE, Xiaomi 12 5G, Xiaomi 12 Lite 5G, Xiaomi 12T Pro 5G, Xiaomi 13 Lite 5G, and Xiaomi Redmi 10 5G. Check Three's latest compatibility list before purchasing a device.

What does *#*#869434#*#* do on Xiaomi?
This engineering code toggles Xiaomi's carrier compatibility check for VoWiFi. On some Xiaomi devices, entering this code can enable the WiFi Calling option if it's missing. It does not guarantee that WiFi Calling will function on unsupported networks or devices.

Why is WiFi Calling missing on my Xiaomi with Three?
Xiaomi devices sometimes hide the VoWiFi option on certain carriers. Try entering *#*#869434#*#* in the dialer. If the option still doesn't appear, your device may not be officially supported by Three for WiFi Calling.

Does Three Ireland support WiFi Calling on all Xiaomi phones?
No. Three Ireland only supports WiFi Calling on specific Xiaomi models. Even if your Xiaomi model is on the list, devices not purchased from Three may not be compatible.

Does WiFi Calling work while roaming with Three?
No. The use of WiFi Calling while roaming on other mobile networks is not supported by Three.

Why does the WiFi Calling icon never appear on my Xiaomi?
Possible reasons include: unsupported device, account not provisioned, missing carrier profile, WiFi Calling disabled in settings, or an unstable Wi-Fi network.

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