What Wi-Fi Calling is, and how it differs from a browser call

What is Wi-Fi Calling, exactly?

Wi-Fi Calling, which Verizon also calls Voice over Wi-Fi or VoWiFi, is a built-in phone feature that carries your calls, texts and video calls over Wi-Fi instead of the carrier's cellular network^[1]. Apple pitches it for places with Wi-Fi but little or no cellular coverage^[9]. You keep your mobile number^[2] and dial a Wi-Fi call like any other^[3].

To see which network a call uses: an iPhone shows "Wi-Fi" in the status bar when you open Control Center^[9], and Android shows "Internet Call" or "Wi-Fi calling" on the notification screen^[3].

What happens under the hood

I read AT&T's network notes to see the route. The phone opens an encrypted IPsec connection to AT&T over UDP ports 500 and 4500, so a router that blocks IPsec pass-through breaks Wi-Fi Calling^[10]. Verizon says Wi-Fi Calling routes calls to its network and prices them by the number dialled, US or international^[1]. How carrier networks then hand calls to each other is the subject of my explainer on the public phone network.

How is Wi-Fi Calling different from calling in a browser?

Both send your voice over the internet, but usually different companies carry the call. Wi-Fi Calling is your carrier's service on your SIM line, so it needs your plan and carrier support^[3]. Browser calling is a separate web service: the tab uses the browser's built-in WebRTC^[11], you sign in to the service, and the service connects the call to the phone network.

Checked November 1, 2026. Carrier terms vary; the emergency row quotes Verizon.

Is Wi-Fi Calling the same as VoIP?

Technically, yes: it is voice over IP, and Verizon's own name for it is Voice over Wi-Fi^[1]. In practice the difference is who runs it. Wi-Fi Calling is VoIP operated by your mobile carrier on your existing number, while VoIP apps and web dialers are separate services with their own accounts, numbers and prices, which is why they can work without a SIM.

So the choice turns less on the technology than on what you have with you, which I sort out in the last section. On a computer, VoIP comes either as an installed softphone or as a dialer in a tab; my softphone explainer compares the two.

Does Wi-Fi Calling cost extra?

It depends on the carrier. Google warns that Wi-Fi calls may cost extra and says to check with your provider^[3]. Verizon charges nothing for Wi-Fi calls to and from US numbers on unlimited talk-and-text plans, and Wi-Fi calls to US numbers don't count against the plan's data, though the Wi-Fi network may charge for access^[1].

Read on Verizon's FAQ on November 1, 2026. Other carriers set their own terms.

For calls abroad, compare your carrier's international rates with a browser dialer's per-minute price. The dialer rates I read on November 1, 2026:

Per minute, lowest published rate on the date checked. Scroll sideways on a phone.

Google Voice's rates apply to US accounts only^[21]. TwinPhone has no free tier^[16], credit starts at $10^[22], and its UK and India mobile rates are higher than Yolla's^[8][19][20].

Can I use Wi-Fi Calling on a laptop?

Only through your phone's line, and in practice mostly on a Mac. If your carrier supports Wi-Fi Calling on iCloud-connected devices, a Mac on the same Apple Account can make and take your iPhone's calls^[9], even when the iPhone isn't nearby^[23]. Apple lists AT&T, T-Mobile USA and Verizon Wireless among those carriers^[4].

Set it up on an iPhone and a Mac

1. On the iPhone, open Settings > Cellular > Wi-Fi Calling and turn on Wi-Fi Calling on This iPhone^[9].
2. Go back, tap Calls on Other Devices, turn on Allow Calls on Other Devices and switch on your Mac^[9].
3. On the Mac, open FaceTime > Settings and turn on Calls from iPhone^[9].
4. Use the same Apple Account for FaceTime and iCloud on both devices^[9]. A Mac mini, Mac Studio or Mac Pro also needs an external microphone or headset^[23].

Windows, Chromebook and Linux

On Windows, the built-in option is Phone Link, which relays calls through your phone over Bluetooth, so the phone has to stay within range^[5]; my Phone Link comparison covers it.

One carrier does put calling in a browser tab: Google Fi customers can call and text from a web browser on their Fi number^[24], but Fi is US-only^[25] and the feature excludes iPhone users^[26]. On a Chromebook, a Linux laptop or a Windows PC without your phone, a browser dialer works on its own^[12]; see calling from a computer.

When should I use Wi-Fi Calling, and when a browser?

Pick by what you have in hand. If your phone and line are with you and only the signal is poor, Wi-Fi Calling keeps your number and plan. If you are on a computer without your phone, have no SIM, or your carrier doesn't offer the feature, a browser dialer is the route that works.

• Weak signal at home or at work: turn on Wi-Fi Calling. If it fails on one network, try another; Apple notes not all Wi-Fi networks work with it^[9].
• Travelling with your own phone: Wi-Fi Calling for calls home, if your carrier prices them as Verizon does, with calls back to the US free^[1]. Set it up before you leave.
• No SIM, no phone nearby, or no carrier support: a browser dialer. Google Voice is free for most US and Canada calls but only for US accounts^[6][21]. TwinPhone needs only an email or Google sign-up and runs in Chrome, Edge, Firefox, Brave and Safari^[27]; its coverage claims don't match, with 145+ countries on one page^[27] and 165 destinations on its rates page^[8].
• An emergency: use your phone. Wi-Fi Calling may ask for an emergency address when you turn it on, and an iPhone uses cellular for emergency calls whenever it can^[9]. Google Voice's free plan and TwinPhone can't dial emergency numbers^[15][16]; my guide to 911 from a computer sets out what works.

Frequently asked questions

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