WiFi and 4G Calling explained

Even more ways to stay connected

Make calls when there's no signal with WiFi Calling, and enjoy improved calls and indoor coverage with 4G Calling – at no extra cost

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WiFi and 4G Calling

Take advantage of more great ways to see what you can do with O2 WiFi Calling and 4G Calling. No signal? No problem. WiFi Calling lets you make calls over a WiFi connection – whether you're at home or on the go. Meanwhile, O2 4G Calling uses our 4G network for much clearer calls.

You'll move seamlessly between WiFi and 4G network coverage to continue your call if you're using WiFi or 4G Calling. You can still check your social media or send an email while you're on the phone too.

All 4G and 5G devices that we stock now support 4G and WiFi Calling. On some Android devices, these features will only work if you're using our firmware – this is the software that makes your device turn on and run. There are sometimes different versions of firmware for the same device too.

Use our device help guides to find out more about setting up WiFi or 4G Calling on your phone.

The best of WiFi and 4G

How WiFi and 4G Calling works

Start your call using your local WiFi network and then, as you step outside, seamlessly move onto our 4G network – if it's available. Check your 4G coverage.
You'll be good to go once we set you up and you switch the feature(s) on. There's no need to sign up, register or download an app.

Use our device guides to help you set up WiFi and 4G Calling.

No extra charges

Calling and messaging over WiFi or 4G is no different to making a standard call or sending a standard text message* . It comes out of your monthly tariff allowances – or it’ll be charged at the normal tariff rate.
There are no extra charges. A minute is just a minute, however you make a call. And you won't use any data to make a 4G call.
If your WiFi connection is free or unlimited, there'll be nothing extra to pay. If your WiFi connection has an allowance, however, your call will come out of that.

More places to connect

You can make calls, take calls and send and receive text messages* wherever you have a WiFi connection. So, you'll be able to stay in touch in more places than ever.
You'll still be able to use the internet or apps on our 4G network while you're making a call.

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FAQs

How do I set up WiFi Calling and 4G Calling?

To help you get started, find the guide you need in our collection of device guides.

How do I pay for WiFi and 4G Calling?

Using either WiFi or 4G to stay connected costs the same as a standard call or text message*. So, that means it'll come out of your tariff allowances in the normal way. Or you'll be charged at the standard tariff rate if you run out.

Where can I use WiFi Calling?

You can use it wherever there's a WiFi connection, including anywhere O2 WiFi is available.

Can I use WiFi and 4G Calling to make calls abroad?

We currently don’t support WiFi Calling outside the UK. In certain circumstances, however, it may be possible to enable the feature when abroad. If so, additional charges will apply.

Can I use WiFi and 4G Calling with other O2 services?

WiFi and 4G Calling won't work with some of our other services – such as O2 Just Call Me, Mobex or Mobile Recording. You'll need to remove them to use WiFi and 4G Calling. If you change your mind later though, don't worry – you can just switch back through My O2 or get in touch for more help.