How to Make Wi-Fi Calls on Xiaomi: A Complete Guide with Setup and Life Hacks

Wi-Fi calling on smartphones Xiaomi — this is not just a convenient feature, but a real lifesaver in conditions of poor mobile network coverage. The technology VoWiFi (Voice over Wi-Fi) allows you to make and receive calls even where there is no operator signal—in basements, remote offices, or country houses. But how do you set this option up correctly? Redmi, POCO or flagship models Mi? And why does the function sometimes refuse to work?

In this article, we will not only look at the basic activation of VoWiFi, but also compare it with VoLTEWe'll find out which operators support the technology in Russia and provide clear instructions for resolving common issues—from missing menu items to network registration errors. We'll also share life hacks for improving connection quality and saving battery life when actively using Wi-Fi calls.

What is VoWiFi and how does it work on Xiaomi?

Technology VoWiFi (or Wi-Fi Calling) allows voice calls to be made over an internet connection instead of traditional mobile networks. This is especially relevant for Xiaomi, where the function is implemented at the firmware level MIUI and is supported by most modern models - from budget ones Redmi Note 11 to the flagships Xiaomi 14.

When calling via Wi-Fi, your smartphone connects to the nearest access point, and the operator routes the call over the IP network, storing your phone number as an identifier. Key benefits:

• 📶 Stable connection in areas with poor 2G/3G/4G coverage
• 💰 Saving when roaming (calls are charged as local ones)
• 🔋 Less battery consumption compared to mobile network search
• 🎧 Best sound quality thanks to the HD Voice codec (if supported by the operator)

It is important to understand that VoWiFi is Not the same as calls through WhatsApp or TelegramThis uses the GSM standard, so the person on the other end of the line will see your real number, not your messenger ID. Furthermore, the feature is integrated into the standard app. Telephone, and does not require installation of additional programs.

Which Xiaomi models support VoWiFi?

Wi-Fi Calling is available on most smartphones. Xiaomi, released after 2019, but there are some nuances. Support depends not only on the model, but also on the version. MIUI, regional firmware, and operator policy. Here are the key points:

To find out for sure whether yours supports Xiaomi VoWiFi, check the availability of the item Wi-Fi calling In your SIM card settings. If it's not there, update your firmware to the latest version or check with your carrier for compatibility.

⚠️ Attention: On some models (eg, Redmi Note 8 Pro) the function may appear only after manually changing the firmware region on EEA (Europe) or Global.

Step-by-step VoWiFi setup on Xiaomi

Activating Wi-Fi calling takes less than a minute if your smartphone and carrier support the technology. Follow these instructions:

1. Open the app Settings and go to the section SIM cards and mobile networks.

2. Select your SIM card (if you have more than one).

3. Tap on the item Wi-Fi calling (on some firmware versions - Wi-Fi Calling).

4. Activate the switch. The system may request confirmation via SMS.

5. Wait for the inscription Connected or Ready for calls in the status bar.

Once activated, an icon will appear in the top notification bar. Wi-Fi Calling (usually it's a tube with waves or an inscription VoWiFi). If there is no icon, try restarting your phone or checking your carrier settings.

Connected to Wi-Fi network|SIM card is active and registered on the network|Firmware updated to the latest version|Operator supports VoWiFi-->

On some firmware versions MIUI The path to the settings may differ. For example, on POCO F3 With MIUI 13 you need to go to Settings → Storage & SIM cards → SIM card settings → Wi-Fi callingIf you can't find the item, use the settings search (the magnifying glass icon in the upper right corner).

VoWiFi vs. VoLTE Comparison: Which is Better on Xiaomi?

Many users are confused VoWiFi And VoLTE (4G calls), although these are two different technologies. Let's figure out the differences and when which feature is preferable:

On Xiaomi Both technologies can work simultaneously. The system automatically selects the optimal option: if the 4G signal is weak but there's a stable Wi-Fi connection, the call will be made over the internet. If you're outdoors with good coverage, VoLTE will be used.

To enable VoLTE, go to Settings → SIM cards and mobile networks → [Your SIM] → Enable VoLTEOn some models (for example, Redmi 10) the option is hidden in the menu Mobile Network → Network Mode → 4G (preferred).

Which operators in Russia support VoWiFi?

By 2026, technology Wi-Fi Calling In Russia, three major operators officially support it, but with some reservations:

• 📡 MTS — full support on most tariffs (except for "Super MTS" and some regional ones). A SIM card of the following format is required nano-SIM and a smartphone with MIUI 12+.
• 📡 Beeline — VoWiFi is available to subscribers with the "Everything" and "Unlimited" plans. This feature may be disabled on budget plans.
• 📡 Megaphone — support is limited to Moscow, St. Petersburg, and cities with a population of over one million. Activation via USSD command is required. *505#.
• 🚫 Tele2 and virtual operators (Yota, Tinkoff Mobile) — do not support VoWiFi.

To check if this feature is available with your carrier:

1. Make sure you have an active SIM card (not a virtual eSIM).
2. Check the list of supported devices on your operator's website.
3. Send a USSD request:
   • MTS: *111*586#
   • Beeline: *110*180#
   • Megaphone: *505#

⚠️ Attention: Even if your carrier supports VoWiFi, the feature may be disabled for corporate plans or SIM cards issued before 2020. In this case, the only solution is to replace the card at the store.

Common VoWiFi Problems on Xiaomi and Their Solutions

If Wi-Fi calling isn't working after setup, here are the most common causes and how to fix them:

1. There is no "Wi-Fi Calling" option in the settings

Possible reasons:

• 📱 Outdated firmware - update MIUI through Settings → About phone → System update.
• 🌍 Regional restrictions - change the firmware region to EEA (Europe) using the tool Mi Flash.
• 🔧 Hidden settings - activate developer mode (Settings → About phone → MIUI version - tap 7 times) and check the item For Developers → Wi-Fi Calling.

2. VoWiFi connects, but calls don't go through

What to do:

• 🔄 Restart your router and smartphone.
• 📶 Check if your router's firewall is blocking voice traffic (open ports) 500 And 4500 for UDP).
• 🔧 Reset network settings: Settings → Storage & SIM cards → Reset network settings.

3. The VoWiFi icon appears but quickly disappears

This indicates problems registering with the operator's network. Solutions:

• 📋 Check your SIM card balance (sometimes operators block VoWiFi if your balance is negative).
• 🔄 Manually select your carrier's network: Settings → SIM cards → Network selection → Manual.
• 📱 Remove and re-add the SIM card in settings.

If nothing helps

Try resetting your phone to factory settings (after saving your data). In 10% of cases, the problem is only solved by a complete reflash. Fastboot.

How to improve VoWiFi call quality on Xiaomi

Even if VoWiFi works, connection quality may be poor. Here are some proven optimization tips:

1. Optimizing your Wi-Fi network

• 📶 Switch your router to a different range 5 GHz (less interference).
• 🔄 Disable data saving in your Wi-Fi settings: Settings → Wi-Fi → Advanced → Data Saver.
• 📡 Place the router closer to your phone or use Mesh system for a larger coverage area.

2. Smartphone settings

• 🔋 Enable Performance Mode: Settings → Battery → Performance mode.
• 📱 Turn off Adaptive communication (if any): Settings → SIM cards → Adaptive connectivity.
• 🔊 Use a wired headset for better voice transmission.

3. Operator verification

• 📞 Check with your carrier if it is supported HD Voice (codec EVS or AMR-WB).
• 📊 Check your internet speed - for stable calls you need at least 1 Mbps.

If problems persist, try an alternative method - calls through Google Fi (requires VPN and US SIM, but quality is often better).

FAQ: Frequently asked questions about VoWiFi on Xiaomi

Is it possible to make calls via Wi-Fi without a SIM card?

No, VoWiFi requires an active SIM card from a carrier that supports the technology. Without a SIM card, you can only make calls via messaging apps (WhatsApp, Telegram, etc.).

Why does VoWiFi only work with one SIM card on a dual-SIM Xiaomi?

This is a firmware limitation. MIUITypically, VoWiFi is only activated for the primary SIM card (Slot 1). The solution is to swap the SIM cards or use an adapter for the second SIM.

Can I use VoWiFi abroad?

Yes, but there are some nuances:

• Calls from MTS and Beeline are charged as local calls (no roaming).
• MegaFon may block VoWiFi in some countries.
• Connection to a local Wi-Fi (hotel, cafe, etc.) is required.

How to disable VoWiFi if it interferes?

Go to Settings → SIM cards → Wi-Fi calling and deactivate the switch. You can also disable the function through the engineering menu (type ##4636## and select Phone information → Wi-Fi Calling).

Does sound quality degrade when switching between VoWiFi and VoLTE?

In modern Xiaomi (With MIUI 13+) switching occurs smoothly, without interruption of connection. However, on budget models (Redmi 9) a short pause (1-2 seconds) may be observed.