Voice Over WiFi  What is it? + What is it for? + Alternatives ▷ 2020

Communicating by mobile phone in a traditional way has become a headache today. Telecommunications antennas are increasingly saturated, the plans offered by telephone providers are increasingly expensive and their services leave something to be desired.

Have you ever thought that if we connected to a WiFi network we could solve all these problems? For some time this has been possible, we can make calls through WiFi and it is not necessary to install any additional application on either of the two phones, receiver or transmitter.

In this article we will teach you what steps should you follow to call by VoWiFi and all the other points that characterize this novel technology.

What is Voice over WiFi and what is this telecommunications technology for?

Voice over WiFi is a technology by which we can make calls from one phone to another through the WiFi network.

The main characteristics of this system is that it is not necessary to apply an application previously so that telecommunication can be carried out between both phones, and as a second important characteristic we highlight that it is totally free because Internet is used through WiFi by dialing a telephone number.

It is necessary to clarify that not all telephone providers offer this service and also not all the phones come with the factory built-in option to enable VoWiFi calls, for those who do not have this option of VoIP calls available we will have to install an additional free application.

VoWiFi vs VoIP Are they the same technology? Main differences

Some people confuse VoWiFi with VoIP, but these two technologies have nothing to do with it. The VoWiFi is a function already included in the mobile through your operator. VoIP is an external service or tool that you must configure or install through an app.

To use VoWiFi our mobile device requires a program granted by the service provider and a subscription to it In which the SIM card must be included since it must be the same as the calls through VoWiFi.

While VoIP is a SIP (Session Initiation Protocol) technology, which uses IP data services. To be able to establish a call via VoIP It is not necessary to have a SIM card, but if an IP connection, which can use mobile data or WiFi, these calls do not depend on the service operator.

Another difference is in the way they use the Internet network. For VoIP you do not need any specific type of Internet, since you can use cell phone data or a broadband connection. while for VoWiFi it establishes precisely that you have to use a WiFi connection.

What are the main advantages of using WiFi Calling?

There are many advantages when using WiFi Calling, we can list some of them:

Costs reduction

When using a WiFi network the The cost that we will have is practically minimal or null because our voice will be broadcast over the network mentioned. We will not use data, we will simply have to activate this service with our telephone operator.

Also if you need to make national and international calls, it will depend on where you are located so that the telephone company considers it a local call, with this the roaming costs will be very low.

More coverage

If there is no signal in the place where we are, for example, in a basement, but there is a network of WiFi available we can calmly make the call.

There is greater WiFi coverage than 3G / 4G networks in the country, in this way we solve the problem when we are in areas where telephone companies are not very interested in having good coverage.

Decongests the transmitting antennas

Another advantage is that it decongests the use of telephone networks conventional, the antennas will not be saturated when we decompress the use of traditional calls. This is a benefit both for us, who use WiFi, and for people who need to communicate in the traditional way since their communications will have fewer interruptions.

No previous applications

As we only need a WiFi network, our phone does not need to have an application installed. The alternative to use WiFi is already incorporated from its manufacture, and if not, we should simply update our operating system so that it can be incorporated into this technology.

This results in protecting our security a little more, since when installing third-party applications, spy files are generally being installed where they can find out about our privacy.

List of operators that allow calls via WiFi in Spain

We show you below a list with the operators that have the WiFi calling service for our country:

  • Orange: Offers a service to make voice calls with any access to WiFi in HD voice quality. At the moment the coverage is only in Spain.
  • Movistar: For a cost of € 10.89 per month plus the cost of the call service according to the tariff table, the company offers coverage throughout the national territory.
  • Amena: If you have a smartphone compatible with this technology, you will not have any additional cost, calls are unlimited and will be charged at a normal rate.

List of operators that allow WiFi calls in Spain

How to activate VoWiFi on your Android mobile and iPhone to call for free?

Once we know that our telephone service operator provides the VoWiFi service and our telephone is compatible with this technology, it only remains to activate the configuration of our mobile.

First of all, we recommend having the chip inserted at the time of service activation and to have LTE or 4G network activated, once the activation is finished you can disconnect the mobile data.

To do this, we are going to detail the actions you have to do step by step:


When we want to activate the WiFi calling option on a device with Android operating system, we will have to do the following steps:

  • We’re going to “Telephone”
  • We push “More”
  • We choose the option “Setting”
  • We click on “Calls”
  • We select “Calls with WiFi”

If this option does not appear, it means that the mobile phone operator does not provide this service.

Once you have done all these steps, you will have an icon at the top of your screen that will indicate that you have VoWiFi activated.


iPhone.  How to activate VoWiFi on your Android mobile and iPhone to call for free

To activate forest Wi Fi calls, follow these steps:

  • We’re going to “Settings”
  • We choose “Telephone”
  • We click on “Calls over WiFi”
  • At this time they will ask us to confirm our address for emergency services when the service is available

When the option to “Calls over WiFi” An icon will appear in the status bar behind the name of the phone service provider.

What alternatives to WiFi Calling to call for free exist?

If the telephone service provider does not offer the possibility of making calls over WiFi, we have another alternative, resorting to the installation of third-party applications.

Next, we will name the most used applications in which you will not have any problem when communicating. They are:


WhatsApp.  Alternatives to WiFi Calling to call for free exist

It is the instant messaging par excellence, connect application we can call our contacts listed in the agenda. We only need a good Internet connection, either through 3G, 4G or WiFi networks.

This application offers not only a voice call, but you can also make a video call, which will depend a lot on the quality of the Internet connection. It is one of the most used apps in the world when it comes to communicating by voice.


With this app you can make calls with your contacts in a free way. The procedure to call is very simple intuitive, you will need to have a good Internet connection for which the voice quality is as clear as possible.


Facebook has the option to provide free calls for all its clients of the social network and is available for phones with Android and iOS operating systems.

In order to establish communication you must be “friend” of the account you want to call, as long as it has this level of privacy activated.


This innovative application allows you to call and send messages without limits, is available for Android, iPhone, Windows and Blackberry among other operating systems.

It also allows you to establish free video calls. The download is free and has good feedback from its users.


With this Google tool we can make calls for free, telephones with international and national numbers. We simply have to be a Google customer, and the procedure to call is very simple, we download the application “Hangouts Dialer” available on the Google Play Store.


It is one of the pioneering applications in voice calling over WiFi. Not only does it allow us to call with our mobile device but we can also do it with our computer once we install the application. The system is intuitive and calls are free and also allow you to call landlines or mobile numbers with a previous charge of money.

If you have any questions, leave them in the comments, we will answer you as soon as possible, and it will surely be of great help to more members of the community. Thank you! 😉

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