Wi-Fi Calling on Xiaomi: a detailed guide to setup and troubleshooting errors

Wi-Fi Calling technology allows you to make calls over the Internet when the mobile network is unavailable or weak, especially for owners of Xiaomi, Redmi and smartphones. POCO, You can turn it on in a few minutes, but there's a nuance: not all models support the technology, and carriers can block it at the level. SIM-map.

In this article, we will discuss how to check your Xiaomi compatibility with Wi-Fi Calling, activate the function in the MIUI settings, and what to do if calls do not pass. Also, you will learn which operators in Russia, Ukraine and Kazakhstan officially support the technology, and how to circumvent restrictions if your tariff does not include VoWiFi. All instructions are relevant for MIUI 12/13/14 and new firmware based on Android 11-14.

What is Wi-Fi Calling and Why You Need It on Xiaomi

Wi-Fi Calling (VoWiFi) is a communication standard that allows voice calls and SMS to be transmitted over Wi-Fi networks instead of traditional mobile towers. The technology is integrated at the operating system level and does not require the installation of additional applications (unlike Skype or WhatsApp).

The main advantages for Xiaomi owners are:

• 📶 Stable signal in areas with poor coverage (for example, in underground parking lots or remote areas).
• 💰 Savings on roaming: Wi-Fi calls are charged as local, even overseas.
• ⚡ Quick switching between mobile network and Wi-Fi without breaking the connection (if the operator supports ePDG).
• 🔒 IPSec traffic encryption, which is safer than public Wi-Fi networks.

It is important to understand that Wi-Fi Calling ≠ VoIP: One is a mobile operator service, the other is Internet telephony via third-party services, for example, Viber calls do not replace VoWiFi, because they use mobile Internet or Wi-Fi data, but are not integrated into the standard phone book.

What Xiaomi smartphones support Wi-Fi Calling

VoWiFi is not available on all Xiaomi devices, and support for it depends on three factors:

1. The chipset should support IP Multimedia Subsystem (IMS).
2. MIUI version – The firmware must include VoWiFi drivers (usually starting with MIUI 11).
3. Operator – not all providers activate the service even on compatible devices.

Below is a table with popular models Xiaomi, Redmi and POCO, which officially support Wi-Fi Calling (data is relevant for 2026):

Important: Even if your model is on the list, the carrier can block VoWiFi at the level. SIM-For example, in Russia, Tele2 and Iota do not support the technology, and MTS and Beeline activate it only at certain rates.

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Before buying a smartphone, check the manufacturer's VoWiFi support in the "Specifications" → "Network" section. For example, for Xiaomi 13, this is listed as "Wi-Fi Calling ready."

Preparation before turning on Wi-Fi Calling

Before you activate the function, follow a few mandatory steps:

Update. MIUI last-minute|Check that SIM-The card supports VoLTE|Connect to a stable Wi-Fi network|Make sure the operator allows Wi-Fi Calling-->

1. Update your firmware. Go to Settings → About Phone → Update your system and install the latest version of MIUI. VoWiFi may not be available in older builds.

2. Activate VoLTE. Wi-Fi Calling only works when VoLTE (voice over 4G) is turned on.

• Open the Settings. → SIM-maps and mobile networks.
• Choose yours. SIM-map → Enable VoLTE.
• If you don’t have an option, contact the operator – your fare may not support the technology.

3. Check it out. SIM-Some operators (for example, MegaFon in Russia) require replacement of the old one. SIM on USIM work VoLTE/VoWiFi. Check it out at the salon.

⚠️ Note: If you are using duality SIM (Two cards, Wi-Fi Calling can only work on the main card SIM (On some Xiaomi models, the function is completely disabled when the second card is activated.

Step-by-step: how to enable Wi-Fi Calling on Xiaomi

If your smartphone and carrier support the technology, follow this instruction:

1. Open Settings and go to section SIM-maps and mobile networks.

2. Choose yours. SIM-card (if there are several).

3.Look for Wi-Fi Calling (may be called Wi-Fi or VoWiFi Calls).

4. Activate the switch. The system can request confirmation — press Enable.

5. Wait for the network to sign up (usually 10–30 seconds) and the status bar will show up with a Wi-Fi Calling or VoWiFi icon.

If the Wi-Fi Calling option is not on the menu, try an alternative method:

Settings → Additional → Special features → Calls on Wi-Fi

Some firmware, like MIUI Global, has the option hidden to unlock it:

• 🔧 Enter the phone code ##869434### (to check the status of VoWiFi).
• 🔧 Use it. ADB-Adb shell settings put global wifi_calling_enabled 1 (Developer rights are required).

Wi-Fi Calling Problems on Xiaomi and Their Solutions

Even after successful activation, users are faced with errors, and consider typical scenarios and ways to fix them:

If after switching on Wi-Fi Calling mobile Internet disappeared:

1. Open Settings → Mobile Network → Network Type.
2. Choose 4G (preferably) or 3G/4G/5G (auto).
3. Turn off and turn on the data transfer again.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 11 Pro)+) After activation of VoWiFi may disappear 5G. This is due to the module conflict. IMS modem X60. The solution is to manually select the network 4G customized.

Wi-Fi Calling on Xiaomi abroad: roaming and restrictions

One of the key benefits of VoWiFi is the ability to make calls over local Wi-Fi roaming, avoiding high rates.

1. Operator support. Not all providers allow VoWiFi roaming. For example, MTS Russia allows you to call over Wi-Fi abroad, but charges such calls as roaming (unless a special package is connected).

2. Regional restrictions: In some countries (e.g. the United States or the UAE) local laws prohibit the use of VoWiFi for foreign users. SIM-In this case, the function will simply not be registered on the network.

Phone settings before the trip:

• 🌍 Make sure that in the settings → Mobile network → Data roaming switch switch switched on.
• 📞 Check that VoLTE and VoWiFi are activated (sometimes they are reset when you change your network).
• 🔄 Reboot your phone after crossing the border, which will speed up registration on your local network.

Critical information: if you use eSIM, Wi-Fi Calling may not work in roaming due to a conflict of profiles. SIM-map.

Alternatives to Wi-Fi Calling for Xiaomi

If your smartphone or carrier doesn’t support VoWiFi, consider alternative ways to make calls over the internet:

• 📱 Google Fi (US only) – a virtual carrier with VoWiFi support on all Xiaomi via the Google Phone app.
• 💬 WhatsApp/Telegram — calls through messengers, but require the installation of the application from the interlocutor.
• 📞 DingTone or TextNow – applications for free calls over Wi-Fi with the issuance of a virtual number.
• 🔄 Dual App (in) MIUI) — cloning WhatsApp or Viber for parallel accounts.

The main disadvantage of alternatives is the lack of integration with the standard phone book, for example, calls via WhatsApp do not appear in the Xiaomi call log, and the quality of communication depends on the messenger servers.

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Wi-Fi Calling is the only way to make Wi-Fi calls with your number displayed SIM-Alternatives (VoIP applications) hide your real number or require you to register with an interlocutor.

FAQ: Frequent questions about Wi-Fi Calling on Xiaomi