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The Best UK Networks for Wi-Fi Calling in 2021

Wi-Fi Calling is now offered by several UK networks, but not all Wi-Fi Calling services are equal. Check out our comparison to learn more.

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Major mobile network operators in the UK are constantly improving both their population coverage and landmass coverage, however there are still plenty of black spots where you just don’t get any reception at all. Along with 4G Calling (VoLTE), Wi-Fi Calling aims to get rid of these black spots and improve your call experience.

Wi-Fi Calling is a technology which allows a smartphone user to make and receive calls over a wireless internet connection rather than a regular cellular connection. However, both your network operator and your handset should be compatible in order for you to benefit from this feature.

Which UK mobile networks have Wi-Fi Calling?

Three logoEE logoVodafone logoo2 logo
BT Mobile logoiD mobile logoVirgin logoSky mobile logo
SMARTY logo

Three

Pro's

  • Has the most 5G coverage in the UK
  • Competitively priced SIM deals
  • WiFi Calling & 4G Calling
  • Free-roaming in 71 destinations
  • Truly unlimited data plans

Con's

  • No 2G coverage
  • 3G and 4G are weaker than their competitors

Three’s perk is available to all customers, regardless of the plan they choose. With this feature turned on Three will keep you connected by using your available Wi-Fi connection even if there’s no mobile signal. We rate Three’s Wi-Fi Calling as the best in the UK, because you’ll be charged in the same way as normal and you don’t have to be on a premium plan to benefit from it. Plus the feature works with both calls and texts and the experience is seamless, so your calls won’t drop in the middle of a conversation.

The feature works right out of the box as long as your mobile device is compatible with the scheme.

 Three Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
All plans

Vodafone

Pro's

  • Entertainment subscriptions bundled with premium plans.
  • Great perks such as VeryMe rewards.
  • 81 inclusive roaming destinations with Unlimited Data Max Plan.
  • Many different plans to choose from.
  • 5G coverage in the UK and in some EU destinations.

Con's

  • Most complaints per 100k customers per Ofcom data.
  • Generally, more expensive plans.

Vodafone’s lets you make calls anywhere you have access to a Wi-Fi connection, even if you don’t have any phone signal. It’s a seamless experience for Vodafone customers as there are no cut offs switching between your regular coverage and Wi-Fi Calling.

Out of the four major mobile network operators in the UK, Vodafone can come across restrictive when it comes to Wi-Fi Calling. You’ll need a Pay Monthly Unlimited, Red or Red Entertainment plan as well as a compatible handset to get Vodafone’s Wi-Fi Calling. The network strongly suggests purchasing the handset directly from a Vodafone store, or else the feature may not work even if your phone is in the supported devices list. Vodafone Basics plans are also excluded, even though they lock your in for a whole year. You don’t need an app for the network’s Wi-Fi Calling to work. Unfortunately, the carriers scheme only works with voice calls, text messages aren’t supported at the moment.

When using Vodafone’s Wi-Fi Calling; calls come out of your monthly allowance, so there are no extra costs.

 Vodafone Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls Only
Works on:
Pay Monthly Plans (Except Basics plans)

O2

Pro's

  • O2 Priority app can save you £ every week with great offers.
  • A decent range of handset options.
  • Over 16 thousand Wi-Fi hotspots.
  • Build your own plan when buying a handset.
  • Decent 5G data speeds.

Con's

  • Most tariffs are pricier than competitors.
  • The slowest 4G internet speeds.
  • Not as good 4G coverage as some of its competititors.

O2’s Wi-Fi Calling feature works perfectly, though the carrier suggests purchasing Android devices directly from their stores to avoid potential issues with the scheme. However, user experiences tell us that devices bought from manufacturers work just fine. While the feature works right away on compatible Apple phones (if you have it turned on), Android devices require you to go into your O2 account and manually turn Wi-Fi Calling on.

The feature works hand in hand with 4G Calling and the experience feels seamless. This means your calls won’t drop even if you get no phone signal as long as you have access to these perks. O2 has thousands of Wi-Fi hotspots and on top of that has a special feature called O2 WiFi which enhances your calls whenever you’re in one of the supported areas.

O2 Wi-Fi Calling is not available to PAYG customers and it’s limited to voice calls only. There’s no charge to your regular bill when you use O2’s Wi-Fi Calling.

 O2 Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls Only
Works on:
Pay Monthly Plans

EE

Pro's

  • Best 3G, 4G & 5G coverage in the UK.
  • Fastest speeds in the UK.
  • A wide range of handset options.
  • Decent rewards and long trials for valuable add-ons.

Con's

  • Some tariffs are significantly pricier than competitors.
  • Not as great as its rivals when it comes to international roaming.

With EE’s Wi-Fi Calling you can both call and text when there’s no phone signal available. Of course you’ll need to be connected to a Wi-Fi hotspot and your device should support the feature.

EE’s Wi-Fi Calling is only available to pay monthly customers, meaning PAYG and Flex deals don’t offer this voice call quality improving perk. EE’s Wi-Fi Calling works seamlessly and can successfully switch between 4G Calling and/or your regular service. You’ll also stay connected below ground with Virgin Mobile’s Wi-Fi hotspots in over 100 London Underground stations.

You’ll be charged at the same rate as you usually would be for using EE’s network, so there are no extra costs.

 EE Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
Pay Monthly Plans

BT Mobile

Pro's

  • Fastest 4G data speeds and best 4G coverage. Also provides 5G.
  • Over 5 million free WiFi hotspots.
  • Great family deals!
  • WiFi Calling & 4G Calling

Con's

  • No monthly rolling plans or PAYG.
  • Not great for roaming abroad.

BT Mobile is one of the few mobile virtual network operators that supports Wi-Fi Calling and the network does it right. At Half Cooked, we think BT Mobile is the best MVNO with Wi-Fi Calling.

BT Mobile is powered by EE, so the operator has the best network coverage in the country. BT’s Wi-Fi calling doesn’t require any extra apps to work. Simply put your SIM in a Wi-Fi Calling ready handset and it will start working. You can send and receive both voice calls and text messages with BT Mobile’s Wi-Fi Calling. Given how BT has millions of Wi-Fi hotspots in the UK, even if you don’t get a phone signal you’ll most likely be covered.

All BT Mobile plans support Wi-Fi calling and the feature comes at no extra cost.

 BT Mobile Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
All plans

iD Mobile

Pro's

  • Low-cost 30-day SIM deals.
  • Wi-Fi Calling & 4G Calling.
  • A decent data rollover feature.
  • A free, one-time data boost that’s valid for three years.
  • 5G coverage at no extra cost.

Con's

  • PAYG plans are limited and don’t include 4G Calling & Wi-Fi Calling.
  • No extras, rewards or a loyalty programme.
  • 5G only available on a few devices at the moment.

Another MVNO with Wi-Fi calling is iD Mobile. Running on the Three network, iD Mobile lets you make and take calls using a Wi-Fi network. You can also use this perk for sending text messages.

iD Mobile’s Wi-Fi Calling has a long list of supported devices and the network is constantly adding new smartphones. The transition between Wi-Fi Calling, 4G Calling and your regular phone signal is seamless and works great.

The carrier’s Wi-Fi Calling comes out of your monthly allowance of minutes.

 BT Mobile Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
All plans

Sky Mobile

Pro's

  • Allows you to keep your unused data for up to three years.
  • Unlimited Sky TV apps streaming, if you’re a Sky TV customer.
  • 5G, Wi-Fi Calling & 4G Calling are included.
  • Free Wi-Fi Hotspots.

Con's

  • No unlimited data plan.
  • 12 month contracts.

Wi-Fi Calling comes as a free feature on all Sky Mobile plans and the network offers support for a decent number of devices, however, many users voiced issues when they use an Android device purchased elsewhere. It’s recommended to purchase your device from Sky Mobile, if you don’t want to take any risks and you use Wi-Fi Calling regularly.

Sky Mobile’s Wi-Fi Calling is not the best, as your calls might drop when switching between 4G calling/standard mobile signal. This doesn’t happen as often anymore though, so you should be good if you choose Sky. Sadly, Sky Mobile’s Wi-Fi Calling doesn’t support texting.

Sky Mobile is powered by the O2 Network.

 Sky Mobile Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls Only
Works on:
All plans

Virgin Mobile

Pro's

  • The best 4G network coverage and fastest data speeds thanks to EE.
  • Over 3.5 million free Wi-Fi hotspots.
  • Data Rollover on all plans.
  • WiFi Calling and 4G Calling on all plans.
  • A wide variety of plans and great discounts.

Con's

  • No longer offers a PAYG service.
  • Restrictions on roaming abroad.
  • No 30-day plans.
  • No 4G Calling.

Piggybacking off EE, Virgin Mobile also offers the best network coverage in the UK. Like the other networks in our list, Virgin Mobile’s Wi-Fi Calling also comes at no extra cost and lets you make and receive calls, even when you don’t get a phone signal. Plus texting is included too.

If your device is compatible and up to date, Virgin Mobile’s Wi-Fi Calling will start working the moment you insert the SIM card into your smartphone. Sadly, Virgin Mobile doesn’t have 4G Calling and normally these two features are a package deal as they complement each other.

All Virgin Mobile deals include Wi-Fi Calling, so you’ll only need a compatible phone for it to work.

 Virgin Mobile Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
All plans

SMARTY

Pro's

  • Money off your bill for any unused data on ‘data discount plans’.
  • No credit checks, 1 month plans, you may cancel anytime.
  • All plans include Unlimited Texts & Minutes.
  • Cheapest 1 month Unlimited Plan in the UK.
  • Now has Wi-Fi Calling.

Con's

  • No 5G.
  • No 4G Calling.
  • No handset plan options.

Powered by the Three Network, SMARTY offers decent 4G network coverage and data speeds in the UK. SMARTY started offering Wi-Fi Calling at no extra cost as of late November 2020, but 4G Calling is yet to arrive. To benefit from SMARTY’s Wi-Fi Calling your device needs to be compatible with the feature.

You can also read our SMARTY Review to discover more about the network. We also covered what SMARTY 5G will be like and how SMARTY’s unlimited data plan works.

 SMARTY Wi-Fi Calling 
Click here to see supported devicesWorks with:
Calls & Texts
Works on:
All plans

Other Mobile Networks

While all four major mobile network operators allow their customers to benefit from Wi-Fi Calling, most MVNOs skip this feature in order to provide competitive prices and deals.

Some of the most notable mobile virtual networks without Wi-Fi Calling are VOXIgiffgaffTesco Mobile and Plusnet. We still recommend you to check them out though, as they offer some other great features like or endless social media & endless video by VOXI.

FAQ

Which mobile networks in the UK have Wi-Fi Calling?

Currently Three, EE, O2, Vodafone, BT Mobile, iD Mobile, Sky Mobile and Virgin Mobile support Wi-Fi Calling.

How do I know if my Wi-Fi Calling works or not?

Wi-Fi calling works automatically on most devices and most UK based mobile networks. However, at times it might not kick in automatically or perhaps for one reason or another the feature might have been turned off on your device. When Wi-Fi Calling is active, you’ll see a special icon or a text at the top of your screen.

Is Wi-Fi Calling free?

Wi-Fi Calling comes at no extra cost, but you must have a compatible device and a price plan for it to work. Wi-Fi Calling will use your regular monthly call allowance.

Can I use Wi-Fi Calling when I’m roaming?

No, all the networks which have Wi-Fi Calling limits the usage of this perk to the UK only. However you can make calls via apps like Facebook Messenger, Skype, WhatsApp etc.

Do I need to download an app for Wi-Fi Calling?

Depends on the network. For example, O2’s Wi-Fi Calling kicks in automatically on supported Apple phones, however for it to work on Android devices you’ll need an app. Most networks don’t require an extra app though.

Does my phone support Wi-Fi Calling?

It depends on which network you’re on. Different mobile network operators have different lists of supported devices. If you have an iPhone 5s or later model, Wi-Fi Calling will likely be available on your phone. As for Android, you’ll have to individually check each network to see if your device is supported.