When mobile coverage is weak at home, in a basement, or in buildings with thick walls, the WiFi calls (VoWiFi) They come into play so you can talk as usual using your phone number, but taking advantage of your wireless network. The idea is simple: instead of the mobile network, the audio travels over the internet through your Wi-Fi, and the result is usually a very stable voice quality in places where mobile phone reception is poor.
In addition to solving indoor coverage problems, this technology is useful when traveling to avoid surprises with voice roaming, all while maintaining the familiar experience: dial from the Phone app, choose a contact, and you're done. However, it's worth noting that, depending on the carrier, VoWiFi calls are charged as normal calls of your tariff and may involve specific conditions, so it is advisable to confirm with your company.
What is VoWiFi and what does it allow you to do?
VoWiFi stands for Voice over WiFi, literally voice over WiFiIn practice, we are talking about a system that allows making and receiving conventional calls (and in some cases, also SMS) using the wireless connection at home, work or any trusted WiFi network, without depending on the mobile operator's signal at that time.
The user experience is identical to a traditional call: you dial the number, search your contacts or return a missed call, and the phone handles routing it over Wi-Fi if available. When active, you'll see notifications on many phones such as "Internet Calling" or "Wi-Fi Calling" in the status bar or in the notifications, so you'll know which channel is being used at any given time.
In operators like Vodafone, the service of Voice over WiFi incorporates HD quality It also allows sending and receiving SMS messages while in use. It's a solution designed to boost indoor coverage (basements, old buildings, homes with metal walls, etc.) whenever there's a Wi-Fi network available. sufficient capacity to sustain the call.
How it works and what requirements you must meet
For it to work, three things are needed: one stable WiFi networkA compatible mobile phone and a VoWiFi-enabled carrier are required. If any of these three are missing, the phone won't display the Wi-Fi calling option or won't be able to connect via Wi-Fi. Therefore, it's advisable to first check your phone's compatibility and confirm with your carrier whether it supports it.
Regarding the device, the vast majority of current models that support advanced calls usually include compatibility with LTE / 4G and with enhanced calling features (VoLTE/VoWiFi). However, the settings path varies depending on the brand or customization layer, so the most practical thing to do is use the Settings search bar and type "Wi-Fi calling" or check the Connections and Networks section.
One important point: even though the voice travels over the Internet, You don't need third-party apps To make a call. The call originates from the phone's native app and, unless your carrier specifies otherwise, is charged like any other call on your plan. Some providers even emphasize that it's essential to have VoLTE enabled to use Voice over WiFi on your network.
Some carriers require you to keep your phone's software updated and activate manually The Wi-Fi Calling option in Settings is disabled by default. Others warn that this service counts towards your data usage. minutes of voice of your tariff, and not in the data, allowing you to manage your usage like a normal call.
Practical advantages of using WiFi calling
The great advantage of VoWiFi is that it lets you make calls with your number even when mobile coverage is poor or nonexistent, as long as you have Wi-Fi nearby. This solves a multitude of everyday problems: corners without signal at home, in complicated interiors, garages, or premises with walls that attenuate the mobile radio.
Another strong point is the cost in certain situations. If you're in a country outside the EU, conventional calls can be very expensive, while VoWiFi is much cheaper. much more convenient when using your WiFi. Within Spain, several operators confirm that VoWiFi calls count towards your plan's minutes, so, on unlimited plans, There is no surcharge.
There is also usually a battery saving Compared to other solutions that rely on mobile radio in poor coverage conditions, this one doesn't have to struggle with a weak signal and maintains the call over the wireless network, which is typically more stable indoors.
In heavily congested networks, the use of VoWiFi helps offload traffic from mobile antennas in hotspots, which can result in a better overall experience for everyone. This is especially interesting in large cities or areas with frequent user overload.
In addition, there are operators that allow the fluid transfer Between VoWiFi and 4G (VoLTE) if you move away from Wi-Fi during a call. In other words, the call can switch to the mobile network without noticeable interruptions, maintaining quality.
Possible limitations and what you should keep in mind
Relying on a WiFi network has its downsides. First, you have to be wary of the public networksIts security is lower and its performance is unpredictable. It is recommended to use private or trusted networks (home, work, familiar places) to ensure quality and privacy.
Another aspect to consider is the geolocation In emergency calls, the mobile network allows for fairly accurate phone location through triangulation, whereas with Wi-Fi, that accuracy is limited to a wide area around the router. In critical situations, this can complicate precise location.
You also need to consider bandwidth at home or in the office. A Wi-Fi call uses up some of your connection, and if the network is already at its limit with video conferencing or downloads, may resent browsing or the quality of other services. If you need to optimize your home network, check out tips for [this].
Finally, the service depends on your carrier's policy. Some carriers restrict its use. to national territoryThey prevent you from activating it outside of Spain or simply don't offer it on their lines, so it's advisable to carefully review the conditions.
VoWiFi, VoLTE and VoIP: how do they differ?
It's easy to confuse these terms. VoWiFi is the voice call over WiFi network Using your number and the Phone app, no mobile coverage is required. VoLTE, on the other hand, carries voice over the operator's data network (4G/LTE), without using WiFi, and is also managed from the native app.
In contrast, VoIP is voice over IP in a broad sense, such as calls from WhatsApp, Skype, or TelegramThey work over both WiFi and mobile data, but depend on third-party apps and are not integrated into your voice plan minutes, but rather into your data usage or the terms of each service.
In practice, VoWiFi and VoLTE are similar from the user's perspective, because they both make calls through the phone app and use your number. The difference lies in the network support: WiFi for VoWiFi y 4G/LTE for VoLTEVoIP, on the other hand, is another alternative, useful if your operator does not offer VoWiFi.
How to activate Wi-Fi calling
Before activating anything, keep in mind two important warnings: your company may apply conditions or charges Specifics apply to VoWiFi, and if your phone doesn't support this service, the option won't appear on your device. If you have any doubts, it's best to contact your carrier to confirm compatibility and requirements.
Activation on Android (possible paths)
On many Android devices, simply open the Phone app, tap More, or tap the menu icon to go to Settings > Calls > Wi-Fi CallingIf your carrier doesn't support it, you simply won't see the option. Some providers allow VoWiFi without additional services, and if they don't offer it, you can always resort to a [unclear - possibly "other service"]. VoIP service game as an alternative.
Another common route on Android is Settings > Network and Internet > Calls and SMS > enable Wi-Fi Calling. On some manufacturers, change this to Settings > Connections > WiFi Calling. Use your phone's search function by typing "Wi-Fi calling" if you can't find the exact menu.
Keep in mind that, if required by your carrier, you may need to keep your phone updated and activate VoLTE. reboot the device After enabling the option. In the case of dual SIM, repeat the process on the line where you want to use Wi-Fi calling.
Activation on iPhone (iOS)
On iPhone, the usual path is Settings > Mobile data > Wi-Fi Calling > turn on "Wi-Fi Calling on this iPhone." If the toggle doesn't appear, your carrier may not yet support it, or a carrier update may be missing.
If you're going to use VoLTE (which some carriers require for VoWiFi), go to Settings > Mobile data > Options > Voice and data, and select LTE/4G. On several models, when VoLTE is available, you'll see the LTE/4G icon and sometimes the logo. HD or VoLTE in the status bar.
How to tell if it's active and what you'll see on screen
Once set up, make calls as usual from the Phone app. If Wi-Fi is available and your carrier supports the service, your phone will display notifications such as "Wi-Fi Call" or "Internet Call". You can also force it by putting your phone in airplane mode and only turning on Wi-Fi: if the call goes through, the VoWiFi is operational.
If you lose Wi-Fi, the phone will make the call over the mobile network when possible. And if your carrier supports it, it's normal for that to happen. WiFi and 4G transfer without interrupting the conversation, while maintaining quality.
Operators in Spain: who offers VoWiFi and what are the best deals
In the Spanish market, support varies depending on the company. Some include it at no extra cost and it's deducted from your minutes, while others don't offer it or limit it to the national territory. Below, a review by operators and relevant nuances drawn from their own indications.
Operators that support it
- OrangeIt supports free Wi-Fi calling if the mobile phone is compatible and the service is activated. Calls are charged as usual. normal call on your bill. For now, Orange indicates that it does not allow the use of VoWiFi outside of Spain.
- MovistarIt supports VoWiFi and VoLTE. You can use Wi-Fi calling if you have coverage problems, and the data plan doesn't include [the additional charges]. additional cost; they are included in the minutes of your plan.
- O2It also offers VoLTE and VoWiFi on all its plans, at no extra cost. At one point, it even enabled it. before the main brand of the group in Spain.
- VodafoneIt supports VoWiFi and VoLTE. Using VoWiFi consumes minutes from your plan. To use it, it is recommended to connect to any carrier's Wi-Fi network and update your mobile device. Enable Voice over WiFi In Settings (Connections) and have VoLTE enabled. It also allows you to send and receive SMS messages through the service.
- JazztelIt offers VoWiFi and VoLTE at no extra cost. Calls are charged as usual. normal call, with the peculiarity that VoWiFi can only be used within the national territory.
- Simyo: Orange group's low-cost brand allows VoWiFi and VoLTE calls on its compatible lines.
- DigiIt offers VoLTE and VoWiFi in its mobile plans, with listings of compatible devices available in their documentation.
Operators that do not currently offer it
- lowiIt does not have VoWiFi calling, although it does offer VoLTE and HD Voice on its 4G network.
- MoreMobileCurrently, it does not support VoWiFi. It recommends alternatives such as WhatsApp, Skype, or Telegram, which work via voice over IP both via WiFi and mobile data.
- TelstraIt does not support VoWiFi calls for now and suggests using communication apps (WhatsApp, Skype, Telegram) for voice calls.
- pepephoneIt does not currently offer VoLTE or VoWiFi on its lines.
- Virgin: does not currently offer any type of internet calling.
- Euskaltel: their customers do not yet have VoLTE or VoWiFi.
Compatible mobile phones and where to find them
Many carriers publish official lists of compatible devices. For example, Vodafone maintains a updated catalog (with references that at the time indicated October 2023), and other brands, such as Digi or O2, also provide compatibility charts. However, the quickest way is to check the phone's specifications or search for the model on Google along with "VoWiFi".
If you're going to buy a mobile phone and you're interested in this feature, confirm that it supports VoLTE/VoWiFi with your specific carrier, because hardware compatibility alone isn't enough: the network must enable it for that model and for your line.
Costs and billing: what the companies say
In most cases, WiFi calls are counted as minutes of voice of your plan. Some operators point out that there is no extra cost to activate VoWiFi, but that calls are charged the same as if you were calling over a mobile network. That is, if you have an unlimited plan, you won't notice a difference, and if you have a minutes package, will be subtracted from that package.
There are also operators that explicitly state that to use it you must activate VoLTE, connect to a WiFi network, and maintain the updated software and turn on the Voice over WiFi toggle in your phone's Settings, because it's disabled by default.
When will you see icons and messages during the call?
If you have VoLTE enabled on a compatible device, you will see the icon when you initiate a call. LTE / 4G in the top bar and, on some models, also the VoLTE or HD logo. With VoWiFi, the icon will usually appear. Wi ‑ Fi during the conversation and, on certain mobile phones, a text notification of "Wi-Fi Call".
To check that it's working, one trick is to activate airplane mode and turn on only Wi-Fi; if the call goes through and you can talk, it means that Your operator has activated VoWiFi for you. and that the mobile phone is compatible.
Alternatives if your carrier doesn't support VoWiFi
If your company doesn't offer it, you always have the option of using apps from IP voice like WhatsApp, Skype, or Telegram. They don't include calls in your minutes plan (they use data or Wi-Fi), but they're very useful for communicating indoors without coverage or when you need to talk to someone only via the internet.
These apps work with both WiFi and mobile data and, depending on your plan, can be a practical solution if your operator hasn't yet offered this feature. adopted VoWiFi in their services.
WhatsApp support: Useful information from some carriers
Some brands provide customer service channels via WhatsApp to resolve queries related to services such as VoWiFi, billing, or setup. This facilitates contact with agents and allows send images or documents to expedite the process.
MásMóvil customers
MásMóvil reminds you that today It does not have VoWiFi. In its guidelines, it encourages the use of WhatsApp, Skype, or Telegram for internet calls. It also offers support via WhatsApp with these instructions: save the number 605 515 454 in your contacts, contact it from a mobile line included in your contract, and, the first time, They will review with you. the service conditions to ensure the best use.
The company indicates that the use of the WhatsApp channel is FreeYou can attach images, documents, and voice notes to facilitate the consultation, and the agents will provide the same solution as by phone whenever you need it.
Yoigo customers
Yoigo points out that, although it does not allow enabling VoWiFi, its customers can use apps like WhatsApp or Skype or Telegram to do so. Internet voice callsIt also offers support via WhatsApp: save 633 996 999 in your contacts, send a message from a line included in your contract, and on your first access, They will validate with you. the terms of service.
As in the previous case, the channel is free of charge And you can chat with specialized agents whenever you need to, getting the same solution as if you called by phone, and with the convenience of attaching material to better explain your case.
Quick questions and tips
Does it use mobile data? For operators that have provided details, VoWiFi calls are counted as minutes of voice from your plan, not as data. Even so, check your carrier's terms and conditions to clarify any doubts about billing and included destinations.
Does the person receiving the call need anything special? No. Since VoWiFi uses your number and the Phone app, you can call any mobile or landline as you would normally do, and the receiver doesn't have to install anything.
Can I use it outside of Spain? It depends on the operator. For example, some companies restrict it. VoWiFi to national territory and they don't allow its use from abroad. Check this if you're traveling and plan to use Wi-Fi for calls.
Is there a difference in quality? In areas with poor mobile coverage, calls over Wi-Fi are usually more stable. Operators like Vodafone say HD quality in its Voice over WiFi service and an improved experience in challenging indoor environments.
VoWiFi has become a perfect ally for those who suffer from dead zones at home or are looking for a more stable indoor experience. By allowing Call using your number over the WiFi network Without extra apps, and with advantages like potential roaming savings, SMS support on some carriers, and the ability to seamlessly switch to 4G, it presents itself as a solid and very practical solution; however, this always depends on your phone being compatible and your operator offers it with the conditions that best suit your use.
