What is WiFi Calling & How Does It Work?


Ever experienced poor, unstable cellular connectivity in places like top-floor rooms, basements, parks, jungle treks, hiking, and trekking routes? Ever become unable to attend to emergency calls in areas with poor reception? Worry no more. WiFi calling comes as a resilient communication solution to help you make critical calls and save your face and reputation.


WiFi calls offer more advanced connectivity than cellular and traditional communication lines. It has expanded the engagement and connectivity options. Without these options, engagement and networking would not have achieved present-day success.


Wi-Fi calling has made connection convenient, smooth, and transformative. WiFi calls have made it easier to connect with one another without spending more finance and carrier data. This internet phone service offers optimum connectivity in areas with unstable carrier accessibility or carrier service glitches, ultimately boosting the capacity for comprehensive engagement.

What is WiFi Calling?

WiFi calling, aka VoWiFi (Voice over Wifi) calling, allows users to call actively over an indoor internet connection instead of using the network carrier. These WiFi calls can be conveniently set up on the phones. Apps and software have been developed to promote VoWiFi calling in the workplace. However, not all phone devices support direct WiFi calls in the system mechanics. As long as a stable connection persists, the quality of the calls is efficient and top-notch. 


Automatic engagement and linkage to connected WiFi networks enable swifter and faster connectivity. It improves network connections when cellular service engagement is flawed, weaker, or unavailable, removing sole reliance on cellular reception. WiFi calling ensures efficient, precise, and quality connectivity with quality performance. It offers better call services and workflow optimization than traditional SIM-based networking.

How Does Wifi Calling Work?

WiFi calling requires a stable internet connection, device, and carrier supporting active calls over Wifi. It enables connection via VoIP protocols instead of Voice over LTE (VoLTE). WiFi calls work the way applications like WhatsApp, Viber, and Skype enable users to connect over WiFi, ethernet, and cellular data. Such calls utilize WiFi data for transmission and save cellular data consumption.


During the process, VPN tunnels exist to make the encryption-decryption process secure and simple. For the smooth transmission of data packets, both sending and receiving parties must confirm that their devices and carriers are compatible with Wi-Fi calling features. Some service carriers set different rules to enable calling through Wi-Fi in their network. This automatically connects to frequently utilized private Wi-Fi connection and require log-ins every time for public WiFi connectivity. 


Some WiFi call services enable the seamless transmission of emergency Save Our Soul (SOS) messages and share the user’s location in low-power and low-data situations. The connection is lost immediately when the user goes beyond the WiFi router range. Based on the situation, some service offers automatic switch between cellular and WiFi connectivity. It helps to facilitate dependable connection when an indoor cellular connection is uneven and unstable.

Is VoWiFi Calling Free or Uses Data?

VoWiFi calling is free in most cases without incurring additional costs. Most carriers treat WiFi calls like regular ones and include active usage in the voice data plan. However, some carriers may charge a minimum fixed amount for long-distance and international calls. Some carriers adopt free WiFi calling as a standard support plan, while some enable it as add-on support.


Remember that VoWiFi calling requires WiFI connectivity for data transmission and network data charge still applies. The carriers may offer WiFi calls as free service in case of unlimited plan purchases and a few add-ons at the lowest charge. 


When you make a Wi-Fi call, the voice data is transferred over the internet instead of the cellular network. As a result, Wi-Fi calling does not consume your cellular data allowance. It is particularly beneficial for users with limited data plans who want to save on their data usage. 


On a Cloud phone system like Calilio, WiFi calls are included in your VoIP plan. We offer advanced VoIP features that redefine internet calls and empower users with streamlined calls at an affordable price.

Are Wi-Fi Calls Safe and Secure?

WiFi calling is safe and secure if the connected internet is safe from unauthenticated access, eavesdropping, and cyber attacks. Encryption of voice data during transmission ensures no third or unsolicited parties can decipher the meaning easily. WiFi calls are also safeguarded with reliable virtual private network (VPN) connectivity to strengthen data privacy. The VoWifi calling security can be enhanced with reduced access to free, public WiFi networks.


Protocols such as Internet Protocol Security (IPSec), Secure Real-time Transport Protocol (SRTP), 3GPP, and Zimmermann Real-time Transport Protocol (ZRTP) help protect data and privacy. Regular security updates and patch boosts WiFi call security. Moreover, calling devices must be protected with strong passwords, and software must be upgraded. System firewalls, antivirus, and third-party accessibility must be frequently assessed to boost security.


WiFi call technology has been adapted to protect devices and network infrastructure against spam, hacking, web phishing, Denial of Service (DoS) attacks, malware, firmware, etc. The users must keep routine tabs on the nature of data being collected and those with direct access to them.

Benefits of Wi-Fi Calling

WiFi calls allow business owners and their teams to interact without spending more data and finance while driving sales. It is used to make calls, send and receive text messages, and conduct virtual conversations in indoor and outdoor settings. Moreover, internet calls offer an optimum opportunity for positive engagement and widen connectivity without disruption.


1. No Additional Charges

WiFi calling provides robust call engagement at nominal pricing. Since it doesn’t consume cellular data, no additional charge is attached to its usage. Instead, wifi calls are often included as part of your existing plan. It makes it a cost-effective option, especially for individuals who frequently make long-distance or international calls.

2. Saves Cellular Data

With WiFi calls consuming internet data only, callers can save precious cellular data for future utilities. Unlike cellular data calls, voice calls made using WiFi are economical. It helps save expenses on long-distance calls. Wi-Fi calling particularly benefits those with limited data plans or those staying in areas with poor cellular coverage.

3. Flexibility

Wi-Fi calling makes it possible to make flexible internet calls. It allows you to make a call from anywhere with a wifi calling-enabled device. This offers the best access to make and receive calls without hassle and doubt. There is no need to procure new equipment, devices, or specialized call apps. Another benefit of Wi-Fi calling is that it can be reaped from flexible use is the simultaneous use of voice and data, which promotes multi-tasking ability.

4. CRM Integrations

VoWifi calling seamlessly integrates customer relationship management (CRM) systems to enhance business productivity. The integrations strengthen communication abilities with cheerful confidence and willpower. This helps to efficiently track and monitor call engagement while widening the net of connectivity.

5. Added Security

WiFi calling employs strong encryption and security measures to enhance call and data protection. WiFi calls ensure safe and secure internet phone service and boost positive engagement. Wi-Fi calling leverages secure Wi-Fi networks, and with its industry-standard security protocols, it provides confident and compatible security in compliance with established safety guidelines and protocols.

How to Turn on WiFi Calling?

Firstly, note that your mobile device and cellular service provider must support Wi-Fi calling. You then need to turn WiFi calling manually on your phone system to enable internet calls. Enabling WiFi calls on iOS and Android phone devices differs from one another. You must ensure that your phone device is connected to WiFi to initiate the process. Network SIM cards must be in their place for service activation. Internet accessibility must be flexible and stable to maintain sturdy backup and resource mobilization.

How to Turn on Wi-Fi Calling on iPhone Devices

A wider range of Apple devices supports WiFi calls, including iPhone SE (all three generations), X/XR/XS, and 11 through 14. Follow the steps below to turn on WiFi calling on iPhone devices.


1. Open the Settings on your device.

2. Scroll down and tap on Phone.

3. Select Wi-Fi Calling.

4. Toggle the slider for Wi-Fi Calling on This iPhone to turn it On position. Also, turn on Prefer WiFi While Roaming if you are constantly moving between different locations.

5. Enable WiFi calling from a pop-up box that appears for confirmation.

6. Set up the address with the local area, state, and Zip code for emergency E911 usage.

7. Tap Done to proceed. You should read the Terms and Conditions for usage and agree. Edit or update the location address if needed.

8. Start making calls over the internet for efficient connection and smooth transition between cellular and WiFi modes. If WiFi goes down, calls get automatically routed to use cellular data.


Note: Some variants do not offer WiFi calling on iPhones.

How to Turn On Wi-Fi Calling on an Android

Your Android phone and cellular service providers must support WiFi calls. Latest Android phones with software version 6/7/8 through 12 (and later) support calls over a Wi-Fi connection. You then need stable internet access. Follow the steps below to enable WiFi calling on Android devices.


1. Open the Phone system and click on the phone icon. 

2. Tap three vertical dots at the top right corner of the screen. 

3. Tap on Settings.

4. Tap Calls.

5. Tap Wi-Fi calling. If you don’t see this option, your carrier or specific phone model  might not support Wi-Fi calling. You should also check the SIM manager with the carrier name in the settings to assess whether WiFi calling is viable.

6. If Wi-Fi calling is available, you should see an option to Turn on Wi-Fi calling. If it’s off, turn it on. Depending on your needs, you can swiftly toggle it on and off.


Note: If the WiFi call feature is not working, check for the next system upgrade, as some device manufacturers roll in the WiFi calls feature alongside the new updates.

Difference Between Cellular Data and Wi-Fi Calling

While cellular data and Wi-Fi calling both serve the purpose of voice communication, there are notable differences between the two. Cellular data relies on the cellular network infrastructure, whereas Wi-Fi calls utilize internet networks to establish calls. Such calling is particularly advantageous in areas with poor cellular coverage, offering an alternative means of communication.


When you use cellular data for voice communication, the voice data is transmitted over the cellular network, and data charges may apply based on your cellular plan. Cellular and WFi data have slightly similar patterns of transmitting the calls but with core differences. The table below showcases the significant differences between cellular data and WiFi calling.


Cellular Data Calls

Wifi calling

Connections are made through a wireless network system without depending on the router.

Connections are fostered through the routers.

Can be conveniently accessed beyond the WiFi range.

Can only be accessed within the range of WiFi router signals.

More confidence in security while accessing public networks.

Less confidence in security accessing the public WiFi networks.

Used often for quick catch-ups over the long-distance.

Used often for lengthy conversations for long-distance engagement.

Utilizes cellular signals.

Utilizes the radiofrequency waves available.

Slower speed compared to WiFi call access.

Faster speed compared to cellular calls.

Set up, maintenance, and management by phone service carriers.

Set up, maintenance, and management by the users themselves or IT experts and ISP for wider adoption.

Automatic/default data encryption with cellular connectivity.

Manual data encryption with WiFi call connectivity.

Highly reliable in public settings.

Less reliable in public settings.

Updates are usually installed by the service carriers.

Updates are usually installed by the service users.

Data transmission through cellular networks.

Data transmission through the WiFi transmitters.

Use of Ultra-High frequency (300- 3000 MHz).

Use of Super-High frequency (3-30 GHz).

Wider access in the rural-urban settings.

Uneven availability in rural-urban settings.

WiFi Calling with Calilio

WiFi calling revolutionizes voice communication to establish connections. With its cost-effectiveness, data-saving feature, flexibility, and added security, making Wi-Fi calls has become a viable alternative to traditional cellular calling.


Calilio offers efficient and powerful WiFi calling facilities, enabling regular engagement and networking. Access flexible call connectivity with stable WiFi connectivity with our VoIP phone system . It allows you to collaborate seamlessly on any device with easy access and instant switching and enjoy a wholesome call experience with clarity and fidelity.


Calilio provides efficient and consistent call quality with a user-friendly interface and dynamic features without delay and disruption. Our comprehensive business communication solutions help businesses enhance customer interactions. 


Sign up and embrace the power of Wi-Fi calling with Calilio. Experience a seamless communication experience like never before. We promise optimum business communication and call engagement to enhance stakeholder relationships.

Frequently Asked Questions

What types of devices can make Wi-Fi calls?

Latest Android and iOS devices like the Apple iPhone 6 through the range of X/11/12/13 and 14 series, Google Pixel 6 and 7 series, and more can make WiFi calls. However, some versions of these devices are not fully compatible with Wi-Fi calling ability. Calilio, being a VoIP system, allows you to make VoIP Wi-Fi calls with devices with and without a cellular connection.

How do I turn WiFi calling off?

You can turn WiFi calling off your phone by accessing settings and then toggling off for Wi-Fi Call, easily on both Apple and Android devices. You can conveniently turn this on and off, per your necessities.

Is cloud telephony the same as VoIP?

Though VoIP and cloud telephony are related, they are not the same. VoIP technology facilitates voice transmission over the Internet, while cloud telephony is a border term that allows various telecommunication services through the Internet going beyond just voice communication.

Does wifi calling work for texts?

Wifi calling offers the ability to make and receive calls and text messages over the internet instead of using cellular data. It lets you easily share texts without worrying about weak cellular coverage.

When to use WiFi calling?

Wi-Fi calling facilitates conversations in scenarios like poor cellular reception, favorable access to reliable internet connectivity, and international travel. While traveling to another country, you can avoid network roaming surcharge using Wi-Fi calls. It helps you conserve limited data available using an accessible WiFi connection to call and text others.

Can I use WiFi calling overseas?

You can make Wi-Fi calls when you are overseas, but international charges may be applied variably depending on dialed international numbers.