Modern mobile communication technologies allow you to make voice calls in places where there was previously no network coverage. Voice over WiFi (VoWiFi), implemented by MTS, ensures stable connectivity even with a weak cell tower signal by switching to a wireless network. This solution has become a lifesaver for residents of new buildings, summer cottages, and apartments with thick walls, where the 4G signal often drops.
However, not all users like this default option. Some encounter situations where the smartphone "clings" to weak Wi-Fi instead of a strong 4G connection, resulting in audio interruptions. Others simply want to use Wi-Fi Calling Purely for the sake of saving money, leaving the main number for incoming calls and choosing a SIM card from a different operator for outgoing calls. In such cases, it becomes necessary to forcibly deactivate the feature.
The deactivation process depends not so much on your data plan as on your smartphone model and operating system version. In this article, we'll detail the steps for various devices, explain the technical nuances of the technology, and help resolve any potential configuration issues.
What is VoWiFi and why should you disable it?
Technology Voice over WiFi (often referred to as Wi-Fi Calling) allows voice data to be transmitted over the internet protocol, similar to how instant messaging apps work, but with higher packet priority. For the subscriber, it feels like a regular call through a standard phone app, without the need to install additional apps or request that the other party be online for a specific service.
Despite its obvious benefits, there are scenarios where this feature can be a hindrance. For example, if you're in a strong 4G area, but your phone automatically switches to public Wi-Fi with low speeds, the connection quality can drop sharply. Some users also prefer to disable this feature to avoid confusion when roaming or to save battery life, as constantly searching for VoWiFi networks can drain resources.
It's important to understand that disabling VoWiFi on MTS doesn't mean a complete ban on internet calls. You'll still be able to use it. WhatsApp, Telegram or ViberWe're talking specifically about the operator's native function, which is integrated into the phone's system menu.
⚠️ Note: The settings interface may differ depending on your smartphone's firmware version. If you don't find the described option, try searching through the settings by entering "Wi-Fi" or "Calls."
Disable WiFi Calling on iPhone (iOS)
Smartphone owners Apple have the easiest access to managing this feature, as the company is implementing VoWiFi support at the system level. To disable this option, you need to go to the device's main settings. Typically, the path looks like this: Settings → Cellular.
If you have a dual-SIM iPhone or use an eSIM, select the specific MTS SIM card from the list. Next, find the item Wi-Fi Calling (or "Wi-Fi Calling") and toggle the switch to the off position (gray). After this, the "MTS Wi-Fi" or "Rus-WiFi" icon in the status bar should disappear.
In some cases, especially when using corporate profiles or older versions of iOS, the path may differ. In that case, it's worth checking the menu. Settings → Phone → Wi-Fi CallingMake sure the slider is off for all available profiles.
It is worth noting that after updating the operating system iOS The settings may be reset to factory defaults, and the feature will have to be disabled again. This is standard Apple security behavior.
Why does the Wi-Fi Calling icon disappear?
Sometimes the icon may disappear on its own, even if the feature is enabled. This happens if the router doesn't support the required encryption protocol or if the internet speed drops below the minimum threshold (usually 1 Mbps).
Settings on Android: Samsung, Xiaomi, Honor
In the world Android The situation is more complicated due to the vast number of shells that manufacturers install on top of the operating system. However, the logic remains the same: you need to find the SIM card or mobile network menu.
For devices Samsung the algorithm is as follows: go to Settings → Connections → Mobile networkHere you'll see the "Wi-Fi Calling" option. Disable it. On some models, this option may be located directly in the main settings menu or in the Quick Panel.
For users Xiaomi (MIUI/HyperOS) you should go to Settings → SIM cards and mobile networksSelect your MTS SIM card and find the "Wi-Fi Calling" toggle. In newer versions of the shell, this option may be hidden if your SIM card doesn't support the feature or if your phone isn't certified for VoWiFi in your region.
On smartphones Honor And Huawei the path often looks like this: Settings → Wireless & networks → More → Wi-Fi callingIf you can't find this option, your phone model may not technically support VoWiFi technology, even if your MTS SIM card activates it.
☑️ Check before disconnecting
⚠️ Note: On some Android models, the menu item may be called "Wi-Fi Calling" or "Internet Calling." Use the settings search if visual search doesn't yield results.
Using USSD commands and the My MTS app
If you can't disable the feature through your phone's settings, you can use service commands or your carrier's personal account. This is especially true if your phone is locked or the settings are hidden by your carrier.
To manage the service via USSD requests, enter the command on your phone keypad *111*178# (The code may change, but the current one is always listed on the operator's website.) In the menu that opens, follow the instructions to disable the "Wi-Fi Calling" service.
A more convenient way is to use a mobile app My MTSGo to "Services" → "Connected." Find the option related to VoWiFi or internet calling in the list and tap "Disable." You can also use the in-app search.
| Control method | Action | Complexity | Speed |
|---|---|---|---|
| iPhone Settings | The slider in the Cellular menu | Low | Instantly |
| Android settings | SIM card menu / Mobile networks | Average | Instantly |
| My MTS app | Services section | Low | Depends on the Internet |
| USSD command | Entering the code 111... | Average | Instantly |
Problems switching between networks
A common user complaint is that the phone gets stuck on Wi-Fi Calling, even when there's a strong 4G signal nearby. This happens because of the operating system's prioritization. The smartphone believes the landline network is more stable and is reluctant to switch back to the cellular network.
To fix this without completely disabling the feature, you can try resetting your network settings. On Android, this is done via Settings → System → Reset settings → Reset Wi-Fi, mobile data, and Bluetooth settingsOn iPhone: Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings.
After a reset, the phone will forget all Wi-Fi passwords, but this often resolves the problem of switching glitches. If the problem persists, it may be the router. Some router models Keenetic, TP-Link or ASUS require a firmware update to work correctly with VoWiFi protocols.
The Impact of Roaming on VoWiFi Operation
The situation when you are abroad deserves special attention. When roaming, the technology VoWiFi It works differently. If you're connected to a hotel or café's Wi-Fi, your call may be charged as a domestic call (based on your region's rates) rather than a roaming call. This is the technology's main advantage for travelers.
However, if you disable VoWiFi while roaming, all calls will be routed through local cellular networks, which can be very expensive. Therefore, it's recommended to check your plan's terms before traveling. If you want to avoid any charges, it's best to remove the SIM card completely or leave your phone in airplane mode with only Wi-Fi enabled for messaging.
Important: In some countries (e.g., the UAE, China), VoWiFi services may be blocked at the government or carrier level, regardless of your MTS phone's settings. In such cases, the icon simply won't appear, even if the feature is enabled.
Is it possible to use VoWiFi without a SIM card?
Technically, the SIM card must be in the phone for initial activation and periodic status checks. However, after activation, some smartphones allow emergency calls or calls through the carrier's app even without a physical SIM card, as long as the eSIM profile is configured or the cache is saved.
Frequently Asked Questions (FAQ)
Does MTS charge extra for using Wi-Fi calls?
No, VoWiFi technology itself is free. Calls are charged according to your basic plan, just like a regular call. If you have unlimited minutes, they are also unlimited over Wi-Fi. You only pay for data traffic when you're not connected to your home Wi-Fi network.
Why didn't the icon in the status bar disappear after disabling the feature?
Try restarting your device. Sometimes the operating system caches the icon states. Also, make sure you disabled the feature for the SIM card currently used for data or the default one for calls.
Is it possible to disable VoWiFi only for outgoing calls, while leaving it for incoming calls?
No, technically it's a single service. It's either active for both directions or disabled completely. Separation is only possible programmatically, by manually switching the SIM card for the call when dialing.
Does disabling VoWiFi affect mobile internet speed?
There's no direct impact on 4G/5G speed. However, if the phone stops trying to maintain a voice channel over Wi-Fi, this may slightly reduce the load on the processor and radio module, which could theoretically extend battery life.
What should I do if incoming calls disappear after disconnecting?
This is rare, but possible due to network registration issues. Check if "Do Not Disturb" or "Airplane Mode" is enabled. If the issue persists, contact MTS support; your SIM card may need to be re-flashed at a mobile phone store.