There is usually one spot in the house where the phone drops to a single bar and calls keep breaking up: the back bedroom, the basement flat, the rooms behind thick walls. In those corners the mobile signal arrives too weak to hold a conversation. The fix, though, is often already at home, sitting in your pocket and on your broadband router.
It is called Wi-Fi calling, or VoWiFi, and it lets you make and take calls over your home broadband instead of the mobile network. Your number stays the same, the person on the other end notices nothing, and every major UK network offers it at no extra cost.
What Wi-Fi calling is and why it will not eat into your data allowance
When mobile coverage is weak but your broadband is steady, the phone routes your voice through the home router instead of the mast. Wi-Fi calls do not use your mobile data allowance: they run over your fixed line, exactly like streaming or browsing.
The minutes are billed just like an ordinary cellular call, coming out of your inclusive allowance in the usual way, so a call to a UK number costs you nothing more than it would over 4G or 5G. If you are not sure how patchy your outdoor coverage really is, it is worth learning how to check network coverage in your area first.
How to turn on Wi-Fi calling on an iPhone
On an iPhone it takes a few taps and stays on until you switch it off by hand.
- Open Settings and tap Phone: the full path is Settings > Phone > Wi-Fi Calling.
- Switch on "Wi-Fi Calling on This iPhone" to turn the service on.
- Enter or confirm your emergency-services address: Apple asks for this the first time, and you should update it whenever you move home.
- Check the status bar: "Wi-Fi" appears next to your network name once everything is ready.
How to turn on Wi-Fi calling on an Android phone
On Android the exact route depends on the make, but the idea is the same.
- Open the phone's Settings: on a Samsung Galaxy it sits under Settings > Connections > Wi-Fi Calling, on Google Pixel and stock Android under Settings > Network & internet > SIMs > Wi-Fi Calling.
- Toggle Wi-Fi Calling on and wait a few seconds for it to register.
- If the toggle is missing, update your phone software first: it usually means the handset or the plan does not yet support it.
Which UK networks support Wi-Fi calling
Coverage of the feature itself is now broad. All four UK networks support Wi-Fi calling on most recent handsets, with no separate activation to request on a compatible phone.
EE was one of the first to roll it out and offers a seamless handover between Wi-Fi and 4G or 5G. You can compare what each provider offers on our mobile networks page.
Good to know: Wi-Fi calling is encrypted between your handset and the network, which makes it safe to use over guest, hotel or public Wi-Fi.
When Wi-Fi calling helps and when it will not be enough
The feature is a genuine fix in a handful of situations, but it is no cure-all. It is worth knowing in advance where it earns its keep and where it hits a limit.
- Homes in a coverage notspot or behind thick walls: Wi-Fi steps in where the mast cannot reach.
- Back bedrooms and basement flats: a steady broadband line is enough to hold a call without hunting for bars.
- Calls to any ordinary number: you keep your own number, with no separate app to install.
- You need a compatible phone and plan: without both, the option never appears in Settings.
- Networks with a sign-in page block it: common in hotels and offices that make you log in.
- A power cut takes the router down and the service with it, as it relies on mains power.
- Abroad, roaming terms apply, and leaving Wi-Fi with no mobile signal drops the call.
If the underlying problem is a slow or unstable home connection, Wi-Fi calling will not paper over it. In that case it is worth sorting out the broadband first, then checking whether your mobile plan and handset are set up to make the most of it.