Ever had a strong Wi-Fi connection at home but almost no mobile signal? Wi-Fi Calling can help in exactly that situation.

Wi-Fi Calling, also called VoWiFi (Voice over Wi-Fi), allows compatible phones to make and receive calls using a Wi-Fi connection instead of relying entirely on the cellular radio network. Depending on the mobile operator, it can also support SMS.

Unlike internet calling apps such as WhatsApp or Messenger, Wi-Fi Calling normally works through your mobile operator and uses your regular phone number.

What Is Wi-Fi Calling?

Wi-Fi Calling is a mobile-network feature that routes voice calls over an internet-connected Wi-Fi network.

Your phone still uses your mobile operator’s network services for authentication and call handling, but the voice traffic travels through Wi-Fi rather than a traditional cellular connection. This can be particularly useful inside buildings where cellular reception is weak.

Wi-Fi Calling is not available on every phone or with every operator. Both the device and the mobile network need to support the feature. 

How Does Wi-Fi Calling Work?

The process is fairly simple from the user’s perspective:

1. Connect to Wi-Fi: Your phone connects to a suitable Wi-Fi network with internet access.

2. Enable Wi-Fi Calling: You switch the feature on in your phone’s settings.

3. Network registration: The phone connects to the operator’s voice-over-IP infrastructure, typically based on an IP Multimedia Subsystem (IMS).

4. Make the call: When Wi-Fi Calling is available, your operator routes the voice traffic through the Wi-Fi connection.

5. Return to cellular service: Depending on the operator and device, the phone may use the cellular network when Wi-Fi Calling is unavailable.

The exact behavior varies between operators and devices. Google notes that not all carriers support Wi-Fi Calling and that settings can differ between phones. 

Why Use Wi-Fi Calling?

The biggest advantage is better calling coverage in places where cellular signals are weak.

For example, a phone might struggle to connect inside a thick-walled house, basement, office or other building. If reliable Wi-Fi is available, Wi-Fi Calling can provide another route for voice calls.

Other potential benefits include:

• Making calls without strong cellular reception

• Keeping your normal mobile number for calls

• Supporting SMS on networks that offer it

• Improving indoor calling reliability

• Providing calling access while traveling, depending on the operator’s policies

However, Wi-Fi Calling does not magically improve a poor internet connection. Congested or unstable Wi-Fi can result in poor call quality or prevent the feature from working properly.

Wi-Fi Calling in Nepal

Wi-Fi Calling is becoming relevant to Nepali users as local operators introduce the technology.

Nepal Telecom (NT) currently provides VoWiFi for compatible devices. Its requirements include a supported handset, active VoLTE service and a suitable Wi-Fi connection. NT says the service can be useful in locations with weak mobile coverage, including some indoor environments.

NT also states that its VoWiFi service can be used by eligible customers while abroad, although applicable call charges depend on the type of call and current tariff. 

Because support depends on the operator, SIM, phone model and software configuration, check your carrier’s current compatibility list before assuming Wi-Fi Calling will work.

How to Enable Wi-Fi Calling

The exact menu differs by phone, but the option is usually found under mobile-network or SIM settings.

On supported Android phones, Google lists Settings → Network & internet → SIMs → Wi-Fi calling as one path.

For Nepal Telecom, the operator currently instructs compatible users to enable VoWiFi in their phone settings and have VoLTE activated. 

Wi-Fi Calling vs Internet Calling Apps

Wi-Fi Calling and apps such as WhatsApp or Messenger are not the same.

Wi-Fi Calling is provided through your mobile operator and normally uses your existing phone number and regular calling service. Internet calling apps operate through their own platforms and generally require both parties to use the same service.

Conclusion

Wi-Fi Calling lets compatible phones use a Wi-Fi internet connection to carry mobile voice calls when supported by the operator. It can be especially useful when cellular coverage is weak but reliable Wi-Fi is available.

For users in Nepal, the feature is already available through Nepal Telecom on supported devices. Before enabling it, check your operator, phone model, SIM requirements and applicable charges.

External Sources/Links

• Nepal Telecom — VoWiFi — Official information on VoWiFi availability, requirements and activation.

• Google Phone Help — Make Calls Over Wi-Fi — Official Android guidance on Wi-Fi Calling. 
• Google Pixel Help — Mobile Connectivity — Guidance on Wi-Fi Calling and carrier support. 

FAQs

Does Wi-Fi Calling use mobile data?

No. When a call is routed through Wi-Fi Calling, it uses the connected Wi-Fi internet connection rather than the phone’s cellular data connection. Your operator may still apply normal calling charges.

Does Wi-Fi Calling work without a SIM?

Usually, operator-based Wi-Fi Calling requires an active mobile service and a compatible SIM or eSIM. Requirements vary by carrier.

Is Wi-Fi Calling available in Nepal?

Yes. Nepal Telecom currently offers VoWiFi for compatible devices and eligible users. Availability and device support can vary.