In the age of widespread wireless networks, the ability to make calls via Wi-Fi has become not a luxury, but a necessity. This feature is especially relevant for subscribers MTS, who often experience unstable cellular network coverage indoors. If you own iPhone and want to use Wi-Fi Calling To ensure uninterrupted communication, this material will help you understand all the nuances of the connection.
Technology Wi-Fi calls Allows you to make and receive calls even without a mobile network, using an internet connection. This is especially useful in basements, elevators, country houses, or abroad, where roaming is expensive. However, not everyone knows that to activate this feature, iPhone There are several hidden steps that need to be completed, otherwise the option simply won't appear in the settings.
In this article, we will take a detailed look at how to check the compatibility of your iPhone With Wi-Fi Calling, what are the tariffs? MTS support this feature, and what to do if calls aren't working after setup. You'll also find answers to frequently asked questions and tips for optimizing the service.
What is Wi-Fi Calling and how does it work on iPhone?
Wi-Fi Calling (or VoWiFi) is a technology that allows voice calls to be transmitted over the internet instead of traditional cell towers. iPhone it is integrated at the operating system level iOS, which ensures high stability and quality of communication. The main advantage is Calls are made using your SIM card number, not through third-party messengers, so subscribers see your regular number.
How does it work technically? When you make a call over Wi-Fi, your voice is converted into digital data packets and transmitted via a protocol. IMS (IP Multimedia Subsystem). This is the same mechanism used in 4G/5G networks for VoLTE. If the network MTS supports VoLTE, then Wi-Fi Calling will work without problems - these technologies are interconnected.
It is important to understand that Wi-Fi Calling It doesn't replace cellular service, but rather complements it. If you have coverage, iPhone Automatically selects the optimal channel (Wi-Fi or carrier network). Switching between them is seamless, without interrupting the connection, provided both connections are stable.
- 📶 Advantages: Calls in uncovered areas, savings on roaming charges, better sound quality.
- ⚠️ Restrictions: Requires operator support, depends on internet speed, may not work with some corporate Wi-Fi.
- 🔄 Auto-switching: iPhone automatically chooses between Wi-Fi and cellular network if both are available.
Requirements for connecting Wi-Fi Calling on an MTS iPhone
Before setting up Wi-Fi Calling, make sure your equipment and tariff meet the minimum requirements. MTS This feature is not supported on all plans or in all regions. Here are the key terms:
- 📱 iPhone model: iPhone 6 and newer (including SE first and second generation). On older models, the function is not available.
- 📶 iOS version: not lower
iOS 12.2For stable operation it is recommendediOS 15+. - 💳 MTS tariff: Most modern plans support VoWiFi, but some corporate or legacy plans do not. Check this in your personal account or by dialing *111#.
- 🌐 Wi-Fi network: must have internet access (even without a password). Corporate networks with browser-based authentication may block VoWiFi.
Please pay special attention to regional availability. MTS gradually expands coverage Wi-Fi Calling, but the feature may be disabled in some cities. You can check support in your region:
- In your personal account MTS in the "Services" section.
- Via USSD command
*111*0887#(call). - By calling support at the number
0890(for free).
⚠️ Attention: If you use iPhone with firmware from third-party developers (jailbreak), Wi-Fi Calling may not work or work unstable. In this case, you need to roll back to the official version. iOS.
Step-by-step instructions: how to enable Wi-Fi Calling on an MTS iPhone
If all requirements are met, we proceed to setup. The process takes no more than 5 minutes, but requires precise adherence to the instructions. Here's what you need to do:
- Update iOS: Go to
Settings → General → Software Updateand install the latest version if available. - Activate VoLTE: Go to
Settings → Cellular → Data Options → Voice & Dataand selectVoLTE(or4G). Without this Wi-Fi Calling it won't work. - Enable Wi-Fi Calling: Go to
Settings → Phone → Wi-Fi Callingand move the slider to the "On" position. If the option is missing, check the compatibility of your plan or model. iPhone. - Confirm address: When first turned on, the system may ask you to enter your emergency address. Please provide a current physical address (this is a legal requirement).
- Restart your iPhone: After activation, restart your device for the changes to take effect.
If after enabling the option Wi-Fi calling If the error does not appear in the settings, follow these steps:
- 🔄 Reinstall your carrier profile:
Settings → General → About → Network operator→ "Reset network settings". - 📱 Check that the SIM card MTS inserted into the slot
SIM 1(if you have two SIM cards). - 🌍 Make sure the region is in the settings iPhone installed as
Russia(Settings → General → Language and Region).
☑️ Check before setting up Wi-Fi Calling
⚠️ Attention: If you use iPhone with eSIM, make sure the profile MTS loaded correctly. Sometimes when reinstalling the eSIM settings Wi-Fi Calling are reset.
Problems and errors when connecting Wi-Fi Calling on an MTS iPhone
Even if you followed the instructions, you may still encounter difficulties. Let's look at common errors and how to fix them:
| Problem | Possible cause | Solution |
|---|---|---|
| The "Wi-Fi Calling" option is missing from the settings. | The tariff does not support VoWiFi or VoLTE is not activated. | Check your tariff in your personal account MTS or call support. Activate VoLTE via *111*4635#. |
| Calls don't go through even though Wi-Fi Calling is enabled. | Wi-Fi network issues (port blocking, low speed) | Reconnect to a different network or reboot your router. Check that your internet speed is at least 2 Mbps. |
| The other person hears an echo or intermittent sound. | Unstable internet connection or network congestion | Disconnect other devices from Wi-Fi or move closer to the router. Try using a wired connection (Ethernet) to the router. |
| Wi-Fi Calling only works when roaming. | In the home region, priority is given to the cellular network | Turn on Wi-Fi Preferred in Settings (if available) or turn off cellular data manually. |
If none of the above helps, try resetting your network settings: Settings → General → Transfer or reset iPhone → Reset → Reset Network SettingsYou'll have to re-enter your Wi-Fi passwords after this, but this often resolves VoWiFi issues.
What should I do if MTS support refuses to help?
If your carrier claims your plan doesn't support Wi-Fi Calling, but you're certain it doesn't, request a written response via chat in your personal account. Sometimes managers make mistakes, and an official request can help clarify the matter.
How to improve Wi-Fi calling quality on iPhone
Even if Wi-Fi Calling While the connection is working, the quality of the connection may leave much to be desired. Here are some tips for optimization:
- 📶 Use 5 GHz: If your router supports two frequencies (2.4 and 5 GHz), connect to the 5 GHz network - it is less crowded and provides a more stable connection.
- 🔌 Wired connection of the router: If possible, connect your router to the internet via cable instead of your ISP's Wi-Fi. This will reduce latency.
- 📵 Disable background updates: IN
Settings → General → Content UpdateDisable automatic app updates over Wi-Fi during calls. - 🔄 Update your router firmware: Go to the router's web interface (usually at
192.168.1.1) and check for updates.
To check the quality of the connection, you can use a hidden function iPhone — field testingIt is activated like this:
- Dial on your phone
3001#12345#and press "Call". - Go to the tab
Serving Cell Info. - View the parameter
rsrp(signal level). The optimal value is higher-90 dBm.
If the value rsrp worse -110 dBm, this indicates a weak Wi-Fi signal. In this case, try using a repeater or mesh system to improve coverage.
Wi-Fi Calling Abroad: How to Save on Roaming with MTS
One of the main advantages Wi-Fi Calling There's the opportunity to save on international roaming charges. If you're abroad and connected to a local Wi-Fi network, calls will be charged as domestic calls (based on your home region's rates) rather than roaming charges. However, there are a few caveats:
- 🌍 Support in the host country: Check with MTS, is it available? Wi-Fi Calling in the country you're visiting. This feature may be blocked in some countries (e.g., China, UAE).
- 📞 Outgoing and incoming: Outgoing calls over Wi-Fi are always cheaper, but incoming calls may incur roaming charges if your carrier's network is unavailable.
- 🔒 Safety: Avoid public Wi-Fi networks without a password—they can intercept your traffic. Use a VPN or a personal hotspot.
To check Wi-Fi call rates abroad:
- Call the short number
*111*0887#— the system will inform you whether the service is enabled. - Or send an SMS with the text
WIFIto the number111(for free).
If you travel frequently, consider fares MTS With an included roaming minutes package. For example, the "Tarifische" plan provides 300 minutes of outgoing calls to 50 countries at no additional charge.
⚠️ Attention: In some countries (eg USA, Canada) local operators may block Wi-Fi Calling for foreign SIM cards. Please check this information with your local SIM card provider before your trip. MTS.
Wi-Fi Calling Alternatives: What to Do If It's Not Working
If Wi-Fi Calling For some reason, it is unavailable. There are several alternative ways to make calls via the Internet:
- 💬 Messengers: WhatsApp, Telegram, Viber They support voice calls over Wi-Fi. The downside is that the other party must also use the same messenger.
- 📞 SIP clients: Apps like Zoiper or Linphone allow you to call regular numbers via SIP accounts. MTS provides SIP access for corporate clients.
- 🌐 Web calls: Services like Skype or Google Voice (with a US number) can be useful for international calls.
- 📡 Local SIMs: In some countries, it is more profitable to buy a local SIM card with unlimited calls.
If it is critical for you to keep your number MTS When making calls over the Internet, consider the service "MTS Connect" It allows you to redirect calls to another number (for example, WhatsApp (or SIP) while maintaining your primary number. Connect through your personal account or by number. 0890.
For corporate clients MTS offers a solution "MTS Cloud PBX", which integrates with iPhone and allows you to make calls over your office phone network via Wi-Fi. This is ideal for remote work.
FAQ: Answers to frequently asked questions about Wi-Fi Calling on MTS iPhone
Can I use Wi-Fi Calling on an iPhone with dual SIM cards?
Yes, but only on the SIM card that supports it. VoLTE. In the settings Wi-Fi calling Select the desired line. If both SIM cards are MTS, the function will work on both, but only on one at a time.
Is Wi-Fi Calling paid on MTS plans?
No, the feature itself is free. Calls are charged at your regular rate. For example, if you have unlimited calls, Wi-Fi calls will also be free.
Why does the other person hear noise or echo when making a Wi-Fi call?
This is due to an unstable internet connection or network congestion. Try:
- Reconnect to another Wi-Fi.
- Disable other devices that consume traffic.
- Use a wired connection for the router.
Does Wi-Fi Calling work on iPhone without a SIM card (eSIM only)?
Yes, if yours iPhone supports eSIM, and the profile MTS activated. The setup is no different from a physical SIM card.
Is it possible to receive SMS via Wi-Fi if there is no cellular network?
No, Wi-Fi Calling Supports voice calls only. SMS requires a cellular connection or messaging apps (e.g. iMessage between devices Apple).