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What are WiFi calls and how can you activate them

21 mayo, 2021

With WiFi calls you can take advantage of the connection to an access point to talk to any phone number. No extras in the rate, with greater stability and regardless of the lack of mobile coverage. Of course, you need a compatible mobile and operator.

They are not a very popular feature since it is not excessively widespread, but there are possibilities to test WiFi calls on a good number of smartphones. Such calls are established over home wireless networks, as dictated by its own name. They work without mobile network coverage, offer good audio quality and a large part of the majority Spanish operators offer them free of charge to their customers. And they are very easy to use if the mobile is compatible.

Call even if you don’t have mobile coverage

Wifi calls Icon indicating that calls are made over WiFi

As with communications through messaging apps, WiFi calls (o VoWiFI, voice over WiFi) use local wireless networks to establish contact between the devices and transmit the voice of the interlocutors converted into digital data to both ends. The biggest difference from ‘normal’ calls is that operator towers are not used with WiFi calls since the user’s wireless network is served.

WiFi calls: what they are, which operators offer them in Spain and how they differ from WhatsApp voice calls

WiFi calls offer several advantages over traditional calls thanks to the characteristics of the infrastructure:

  • No need for mobile coverage. That you are far from an area covered by your operator and still want to make calls? If you have active WiFi calls, and you have a connection to a local network, you can call any number just as if you were using the operator’s coverage.
  • Communication is stable and with sufficient quality. Inside the home there is usually better WiFi coverage than the mobile network (as long as the distance to the router is not excessive). Thanks to this, calling via WiFi often offers fewer cuts than calling via mobile.
  • You can call any phone number using the WiFi. Since only the infrastructure changes (from the carrier towers to the WiFi access point), it is still possible to call anyone just by dialing their phone number. Also, the called contact is not required to be using WiFi calling as well.
  • They can save some battery. As the mobile is not constantly connecting with the telephone towers, the smartphone requires less energy to process communications, at least on paper.
  • There are no extra costs, nor do you have to change the application. Operators do not overcharge for WiFi calls, although you may not have them included in your rate (usually in all contract ones). In addition, the process is carried out in a transparent way since it is the phone application that takes care of the task (the icon of a phone with the WiFi waves appears).

Despite the use of the WiFi network, all calls that make use of this network cost the same as ‘normal’ calls. At the pricing level there are no differences

The basic difference at the operational level is that the phone changes the sending and receiving of data (voice only) from the telephone network to the WiFi network: the rest of the process is the same for both types of calls. There are hardly any changes to the phone’s interface either.

This is how WiFi calls are activated on the mobile

Wifi calls Configuration using connection settings

In general, phones that support WiFi calls offer the possibility of activating them when a SIM that supports them is inserted. In Spain, Movistar, Orange, Amena and O2 offer this type of communication. In terms of mobiles, Samsung is the manufacturer that offers the best compatibility: its higher-priced phones, and a good part of the Galaxy A family, include WiFI calling among their options. Also the iPhone from the 5S; in addition to other brands, such as Huawei, LG and even Alcatel. And it is not only a matter of the telephone, support for WiFi calls also depends on the operator (Orange is the one that supports the most devices).

To activate WiFi calls, and as long as your mobile and operator are compatible (the SIM must be in the phone), you must do the following:

  • Go to the mobile settings and enter the connection options.
  • You will see that the option of ‘WiFi Calls’ appears. Activate them and from that moment all voice communications will be over the home network (as long as you have a WiFi connection).
  • Another way to activate calls is through the phone application. Open it.
  • Enter the three menu items and go to the settings.
  • The available option of ‘WiFi Calls’ should appear.
  • If the activation does not appear, your mobile is not compatible with WiFi calls. It could also be that the operator did not offer you that service (or that it does not support your phone).
  • You do not have to activate WiFi calls on your operator, they should be active by default: it only performs the process on the mobile.
Wifi calls Activating WiFi calls from the phone app

To check which mobiles are compatible with WiFi calls in the different Spanish operators you can go to this article: there you have the complete and updated list. Even so, that your mobile does not appear does not imply that it lacks those calls: operators are constantly adding new compatible mobiles.

The experience is similar to ‘normal’ calls

Wifi calls Call in progress via WiFi network

We have been testing WiFi calls on a Samsung with the operator Movistar and the truth is that the experience was satisfactory: after the activation process the phone has exchanged the mobile infrastructure for the WiFi network without losing audio quality and gaining remarkable stability in telecommunications (In the test home there are usually cuts in communication due to coverage deficiency). The icon of the phone with the WiFi waves is the only difference visible to the naked eye.