Modern smartphones Xiaomi provide users with a wide range of options to improve the quality of communication, and one of the key features is technology VoWiFiThis option allows you to make voice calls over a Wi-Fi network, which is especially useful in areas with poor cellular signal, such as basements, offices with thick walls, or country houses. For carrier subscribers Megaphone Activating this service opens up new horizons of stable communication without the need to use third-party applications.
The setup process may seem complicated at first glance, but in reality, it requires several sequential steps in the smartphone menu and checking your data plan. It's important to understand that sound quality and connection stability directly depend on your internet speed and router configuration. In this article, we'll cover all the activation details in detail. Wi-Fi calls, possible connection errors and ways to quickly resolve them.
What is VoWiFi and why do Megafon subscribers need it?
Technology VoWiFi (Voice over Wi-Fi) is a method of transmitting voice traffic over an internet protocol, but unlike messaging apps, it's integrated directly into the device's standard phone book. This means you don't need to open a separate app, search for a contact, and wait for the other person to respond—you simply dial the number as usual. For the operator Megaphone It is a way to provide coverage where base stations physically cannot penetrate obstacles.
This feature is especially useful in situations where the cellular signal level drops to a minimum, but a stable wireless internet connection is available. In such conditions, regular calls may be dropped or not connect at all, while Wi-Fi Calling Provides crystal-clear sound. Furthermore, many plans offer Wi-Fi calling minutes either free of charge or included in the basic package, saving you money.
It's worth noting that the technology is secure and doesn't require entering additional passwords or creating accounts. Smartphone Xiaomi Automatically switches between cellular and Wi-Fi depending on signal quality, ensuring uninterrupted calls. However, for proper operation, the SIM card itself must support modern communication standards and be registered to a 4G/LTE network.
Checking device and tariff plan compatibility
Before you start setting up the menu, you need to make sure that your equipment and SIM card are technically ready to work with VoWiFiNot all smartphone models Xiaomi, especially those released several years ago, have hardware support for this feature in firmware for the Russian market. It's also important to have the latest version of the shell installed on the device. MIUI or HyperOS.
For subscribers Megaphone It's important to note that the "Wi-Fi Calling" service must be activated by your carrier. Most modern plans have it enabled by default, but older, archived plans may require manual activation via your account or a USSD command. Checking compatibility is the first and most critical step; ignoring it can lead to wasted time.
To check the service status, you can use the following algorithm:
- 📱 Open the Megafon app or your personal account on the operator's website.
- 🔍 Find the "Services" section and look for the "Wi-Fi Calling" or "VoWiFi" option.
- ✅ Make sure the switch is in the active position, or click the "Connect" button.
If the service is active in your personal account but your phone doesn't detect it, the problem may lie with your SIM card profile. In rare cases, replacing the old SIM card with a new one that supports 4G is necessary, as the protocol is based on 4G networks. IMS, necessary for the technology to operate.
Step-by-step instructions: activating the feature in Xiaomi settings
After confirming compatibility, you can proceed to the direct configuration of the smartphone. Interface MIUI The menu may vary slightly depending on the version, but the logic behind the layout remains the same. You'll need to find the hidden or clearly marked menu responsible for cellular network and wireless connection settings.
First, you need to go to the device's main settings. To do this, unlock the screen and tap the gear icon. The next step is as follows:
- 📶 Select "SIM cards & mobile networks" (or "Connections and sharing").
- 📞 Click on your operator's name Megaphone in the list of active SIM cards.
- 🌐 Find the "Wi-Fi Calling" switch and toggle it to the "On" position.
The path may vary depending on your firmware version. If you can't find the switch in the SIM card menu, try using the global settings search. Tap the magnifying glass at the top of the settings screen and search for "Wi-Fi" or "VoWiFi." The system will automatically prompt you to navigate to the appropriate menu item.
☑️ VoWiFi Activation Checklist
Once enabled, a special icon should appear in the status bar next to the signal strength indicator. Typically, it's an image of a phone handset with Wi-Fi symbols or the words "Wi-Fi Call." This indicates that VoWiFi protocol successfully activated and ready to work.
⚠️ Note: If the icon does not appear within 1-2 minutes after turning on the switch, try restarting your smartphone or temporarily turning airplane mode on and off.
Troubleshooting: Why VoWiFi Isn't Working
Even with proper configuration, users may encounter a situation where the feature does not activate. The most common cause is the device not registering on the network. IMS operator. This may be due to errors in the phone's firmware or temporary failures on the base station side. Megaphone.
Another common issue is roaming. If you're abroad, Wi-Fi Calling may not work even if you're connected to the local internet, as your carrier blocks this feature to prevent roaming bypass. It's also worth checking that your phone isn't set to "2G/3G only," as VoWiFi requires LTE support.
Let's look at the main causes of failures in the table below:
| Problem | Possible cause | Solution |
|---|---|---|
| There is no switch in the menu | Old firmware or model | Update software or change region |
| The icon is not lit | Weak Wi-Fi signal | Move closer to the router |
| Calls are being dropped | Unstable internet | Check your channel speed |
| IMS registration error | SIM profile failure | Reinsert the SIM card |
If none of these methods help, it's worth resetting your network settings. This will reset all mobile data and Bluetooth settings to factory defaults, but will not delete your personal data, photos, or contacts.
How to reset network settings on Xiaomi?
Go to Settings → Connection and Sharing → Reset Wi-Fi, Mobile Networks, and Bluetooth → Reset settings. Your phone will then reboot.
Setting network priority and data roaming
An important aspect of use VoWiFi is the correct network priority setting. Smartphone Xiaomi Allows you to choose which network to use first when receiving an incoming call. This is especially useful if you frequently move between areas with different coverage.
In the Wi-Fi calling settings menu, you'll often see an option called "Preferred network for calls." Here, you can choose between "Mobile network preferred" or "Wi-Fi network preferred." To resolve issues with poor indoor signal strength, we recommend choosing the latter. This will cause your phone to ignore weak cellular signals and use a stable internet connection.
Data roaming is also worth mentioning. For VoWiFi to work in some scenarios (especially abroad or on corporate networks), mobile data roaming may be required, even if you're not using mobile data directly for voice transmission. This is necessary to ensure registration signals are processed within the operator's network.
The Impact of Internet Connection Quality on Voice Communication
Voice quality through Wi-Fi Directly depends on the channel's bandwidth and packet loss rate (ping). Unlike web browsing, where only loading speed is important, connection stability and low latency are critical for voice calls.
If your router operates in the crowded 2.4 GHz band, interference from neighboring networks and household appliances may occur, resulting in a tinny sound or interruptions. It is recommended to switch your smartphone and router to the 5 GHz band, where there are more channels and less interference. This will ensure clearer sound when talking over the Wi-Fi network. Megaphone.
It's also important to consider the bandwidth load. If someone in the household is actively downloading large files or watching 4K videos, there may not be enough bandwidth for voice traffic. In such situations, modern routers use QoS (Quality of Service) technology, which prioritizes voice traffic, but it needs to be configured correctly.
Frequently Asked Questions (FAQ)
Does making calls over Wi-Fi use up mobile data?
No, the minutes of conversation are deducted from your basic package of minutes of the tariff. Megaphone, just like with regular calls. Internet traffic is either not used or is used minimally for service signals, but it is not billed as megabyte consumption.
Will VoWiFi work if there is no mobile network at all?
Yes, this is the main advantage of this technology. If your SIM card shows "No Service" or "Emergency Calls Only," but your phone is connected to Wi-Fi and the service is activated, you'll be able to make and receive calls without any problem.
Can I use VoWiFi while roaming abroad?
Technically, this is possible, but the terms depend on your carrier's plan. Often, Wi-Fi calls from abroad are charged as calls from Russia (to Russian numbers), which is significantly cheaper than standard roaming, but you should check with your carrier for current terms. Megaphone.
Why does the Wi-Fi Call icon disappear during a call?
This could mean that the smartphone automatically switched to the cellular network due to its current best quality, or the connection to the router has become unstable. This can also happen during an incoming call if the phone hasn't registered with the IMS network yet.
⚠️ Note: The settings interface and the availability of specific menu items may differ depending on the MIUI/HyperOS version and the regional firmware version of your Xiaomi smartphone.