Modern living conditions dictate their own rules, and high-quality communication is becoming critically important everywhere. We often encounter situations where there's virtually no cellular signal indoors, but stable internet access is available. It's precisely for such situations that an operator Megaphone implemented the technology Voice over Wi-Fi, which allows you to make and receive calls over a wireless network.
This function, also known as VoWiFi, works on most modern smartphones and doesn't require any additional apps. All calls are charged according to your basic plan, just like regular voice calls, making the technology not only convenient but also cost-effective. In this article, we'll cover how to activate the service, set up your phone, and troubleshoot possible connection issues.
The main advantage of this technology is that it uses the existing internet infrastructure to transmit voice traffic. If you have a router at home or in the office, but only one or two devices are receiving a signal, enabling this option will solve the subscriber's unavailability problem. Let's look at the technical requirements and step-by-step instructions for different operating systems.
VoWiFi Technical Requirements and Operating Conditions
Before you begin setting up, you need to make sure that your equipment and SIM card meet the required standards. Technology Voice over Wi-Fi requires not only the presence of a wireless network, but also support from the device and operator. Megaphone provides coverage of this service throughout almost the entire territory of Russia, but the basic equipment must be in good working order.
First, your SIM card must be registered on the 4G (LTE) network. If you're using an older SIM card, manufactured many years ago, you may need to replace it at a mobile phone store. It's also important to have the VoLTE service activated on your phone, as these technologies are often interconnected in carrier network profiles.
The smartphone must support the VoWiFi standard. Most flagship and mid-range models released after 2018 already have built-in support. However, the software must be updated to the latest version, as carrier profile settings are included with system updates.
⚠️ Please note: Call quality directly depends on the speed and stability of your internet connection. For a comfortable call, we recommend a speed of at least 2 Mbps and a ping of less than 100 ms.
It's also worth noting that the router must correctly pass SIP traffic. Some corporate networks or public access points may block ports required for voice communications. Such restrictions are extremely rare in a home network, but if you have complex firewall settings, this should be checked.
Activation of the service on the operator's side
The first step before setting up your phone is to check the service status in your subscriber profile. Although on many plans Megaphone This feature is enabled by default, but in some cases manual activation is required. This can be done in several ways, all from the comfort of your home.
The fastest way is to use a USSD command. Type it on your phone's keypad. *105*0035# and press the call button. The system will immediately process your request and inform you of the service status. If it's not active, follow the menu instructions or use the connection command provided in the reply SMS.
An alternative option is to use your personal account or the Megafon mobile app. In the "Services" or "Communications" section, find the "Wi-Fi Calling" option and toggle the switch to the on position. This will sync your network settings.
After carrier activation, you may need to reboot your device to receive the new network profiles. Don't skip this step, as your phone needs to pick up the updated IMS domain registration parameters.
Setting up WiFi calling on Android
The process of enabling the function on smartphones running Android may vary slightly depending on the manufacturer and operating system version. Interfaces Samsung, Xiaomi or Google Pixel have their own menu layout features.
In a standard situation, you need to go to the main settings of your device. Find the "Connections," "Mobile Network," or "SIM Cards and Mobile Networks" section. Inside this menu, look for "Wi-Fi Calling."
If you can't find the switch in the general settings, try using the settings search. Enter "Wi-Fi" or "Calls" in the search bar, and the system will automatically show you the path to the desired menu. This is especially useful for highly customized skins.
☑️ Android Setup Checklist
Once enabled, a corresponding icon should appear in the status bar (usually next to the Wi-Fi indicator). It may look like a telephone handset with a Wi-Fi symbol or say "Wi-Fi Call." This means the phone is ready to use.
In some cases, you may need to select a preferred network type. It's recommended to select "Prefer Wi-Fi" or "Wi-Fi Only" if you're in an area with very poor cellular coverage to prevent your phone from trying to switch to unstable 3G.
Instructions for iPhone (iOS) users
For smartphone owners Apple We're lucky to have a unified interface, so finding the setting takes minimal time. However, there's a catch: the feature must be supported by the operator and enabled in the device profile.
To activate, go to the "Settings" menu and select "Cellular." If you have two SIM cards, select the one that belongs to you. MegaphoneNext, find the "Wi-Fi Calling" option and turn on the switch.
When first turned on, the system may display a warning about transmitting location data to the operator for emergency calls. This is a standard procedure required for the 112 service to operate over the internet protocol, as GPS coordinates may be transmitted differently than via cell towers.
⚠️ Important: Make sure your iPhone is running the latest version of iOS. Older versions may not contain the latest carrier settings profiles for VoWiFi to work properly.
Once enabled, you'll see "Megafon Wi-Fi" or simply "Wi-Fi" next to the operator's name in the status bar. Now all incoming and outgoing calls will be routed over the wireless network if the cellular signal is weak or absent.
What to do if the switch is gray and inactive?
If the "Wi-Fi Calling" menu item is grayed out and unresponsive, this means your carrier has temporarily blocked the service at the network level for your number, or your carrier profile is out of date. Try removing and reinserting your SIM card, then check for updates in Settings -> General -> About (scroll down). If this doesn't help, contact Megafon support to reconfigure the service.
Compatibility table and indicators
Understanding what's happening with your smartphone helps you diagnose problems faster. Different device models use different visual indicators to indicate connection status. Below is a table to help you decipher your connection status.
| Device / OS | Menu location | Indicator in the status bar | Required software version |
|---|---|---|---|
| iPhone (iOS 12+) | Settings -> Cellular | Wi-Fi or Megafon Wi-Fi | iOS 12 and above |
| Samsung Galaxy | Settings -> Connections | Wi-Fi handset | Android 9+ |
| Xiaomi / Redmi | Settings -> SIM cards | VoWiFi icon | MIUI 10+ |
| Google Pixel | Settings -> Network & Internet | HD / Wi-Fi Call | Android 8+ |
For example, on some models Xiaomi The icon may only appear during an active conversation, rather than remaining visible. This is normal system behavior to conserve interface resources.
If the icon isn't visible after all the settings have been completed, it may indicate that your current Wi-Fi access point has a high ping or is unstable. Try moving closer to the router or rebooting it.
Troubleshooting and troubleshooting
Despite the simplicity of the technology, users may encounter difficulties. One common issue is the inability to register on a VoWiFi network. This can be caused by ports being blocked by your home internet provider or by antivirus software on your computer if you're sharing from a PC.
It's also worth checking your date and time settings. If the time on your device is incorrect, security certificates won't be verified, and your connection to servers won't be possible. Megaphone Voice calls won't work. Set the "Use network time" option to automatic.
In some cases, resetting network settings can help. This will delete saved Wi-Fi passwords and Bluetooth settings, but it often resolves issues with registering with the carrier's IMS domain. The reset path is usually located under "System" -> "Reset" -> "Reset Network Settings."
⚠️ Important: Before resetting your network settings, make sure you remember the passwords for your Wi-Fi networks, as you'll have to re-enter them. This will not affect your personal photos, contacts, or apps.
If all else fails, your router may be using IPv6, which isn't always handled correctly by your carrier for voice calls. Try temporarily switching to IPv4 in your router settings, or vice versa, if possible.
Frequently Asked Questions (FAQ)
Do you charge for calls over Wi-Fi?
No, there are no separate charges. The minutes are used from your basic package. Megaphone, just like a regular call. If your minute package is used up, you'll be charged according to your plan's terms.
Does VoWiFi work when roaming?
Yes, the technology works abroad. While roaming, you can call Russian numbers via Wi-Fi, and it will be charged as a call from Russia (according to your plan), which is significantly cheaper than a standard roaming call over a cellular network.