WiFi Calling: What It Is, How It Works, Advantages and Disadvantages

What is Wi-Fi Calling?

Wi-Fi Calling is a technology that allows users to make voice and video calls over a Wi-Fi network instead of using a traditional cellular network. This feature is useful when mobile network signals are weak or unavailable. With Wi-Fi calling, calls can be made from any location where a Wi-Fi connection is available, such as homes, apartments, offices, or even underground areas like subways where cellular signals are usually weak.

Wi-Fi calling works very similarly to a regular phone call. The processes of call connection, authentication, and routing are handled by the mobile carrier, but the call is transmitted through the internet instead of a cellular tower. Because Wi-Fi calling uses internet connectivity, users with compatible devices can often make free calls to domestic numbers while travelling internationally. However, calls to international numbers may still incur long-distance charges depending on the service provider. This technology mainly works using IP-based communication, allowing calls to travel through internet networks rather than mobile towers.

How to Enable Wi-Fi Calling

Wi-Fi calling is supported on most modern Android and iOS smartphones. To use this feature, you simply need to enable it in your device settings.

Enable Wi-Fi Calling on iPhone

1. Open Settings on your iPhone.
2. Tap Mobile Data or Cellular.
3. Select Wi-Fi Calling.
4. Turn on Wi-Fi Calling on This iPhone.

If your mobile carrier supports Wi-Fi calling, the feature will activate automatically when you connect to Wi-Fi.

Enable Wi-Fi Calling on Android

1. Open Settings.
2. Go to Network & Internet.
3. Select Wi-Fi Preferences or Advanced Calling.
4. Enable the Wi-Fi Calling option.

Wi-Fi Calling Support in India

In India, major telecom providers such as Jio and Airtel offer Wi-Fi calling services. These networks allow users to make calls through Wi-Fi using both Android and iOS smartphones. Some of the commonly supported devices include:

• Apple iPhones such as iPhone SE and iPhone 11 series
• Samsung smartphones
• OnePlus smartphones
• Xiaomi devices such as Redmi K20 and Redmi Note 7
• Poco F1 and other supported models

Jio supports a wide range of smartphone brands including Samsung, Vivo, Xiaomi, Infinix, Motorola,
Techno, Coolpad, and Apple iPhones.

How to Make a Wi-Fi Call

Before making Wi-Fi calls, the feature must be enabled in your phone settings and supported by your
mobile carrier. Once activated, making a Wi-Fi call is just like making a normal phone call:

• Connect your smartphone to a Wi-Fi network.
• Dial the number normally using the phone dialer.
• Your phone will automatically route the call through Wi-Fi.

When Wi-Fi calling is active, your device may display indicators such as “Wi-Fi Call” or “Internet Call” on the screen. If the Wi-Fi connection is lost, the call may automatically switch back to the mobile network.

How Wi-Fi Calling Works

Wi-Fi calling mainly works using Voice over Internet Protocol (VoIP). This technology converts voice signals into digital data and sends them over the internet. Many popular communication applications such as Facebook Messenger, WhatsApp, and Skype also use VoIP technology to make voice and video calls over the internet. With modern smartphones and strong internet connectivity, users can easily make Wi-Fi calls without requiring additional applications or complex setup.

Advantages of Wi-Fi Calling

• Provides clear voice quality when cellular signals are weak.
• Works anywhere with a stable Wi-Fi connection.
• No additional application is required.
• Does not consume cellular talk-time minutes.
• Does not use LTE mobile data.
• Offers improved audio quality.
• No extra login or registration required.
• Supported by most modern smartphones.
• May help improve battery life.
• Requires very little bandwidth.

A typical Wi-Fi voice call consumes approximately 1 MB of data per minute, while a video call usually consumes around 6–8 MB per minute.

Disadvantages of Wi-Fi Calling

• Call quality depends on Wi-Fi signal strength.
• Some smartphones do not support Wi-Fi calling.
• International calls may still incur charges.
• Data usage charges may apply depending on the internet plan.
• Possible delays due to network latency.
• Not supported in all countries or by all carriers.