WiFi Calling UK 2026: How It Works on Every Network

Updated March 2026 · Covers all UK networks and major phone brands

WiFi calling is one of the most useful features on modern smartphones, yet most people don’t know it exists. If you’ve ever struggled with poor mobile signal at home, in the office, or in a basement, WiFi calling can solve the problem instantly — and it’s completely free.

This guide covers everything you need to know: what WiFi calling is, how to enable it on Samsung and iPhone, which UK networks support it, and how to troubleshoot common issues.

What Is WiFi Calling?

WiFi calling (also called VoWiFi — Voice over WiFi) is a feature that routes your phone calls and text messages through a WiFi network instead of a mobile mast. When enabled, your phone automatically switches to WiFi calling when mobile signal is weak.

Key facts about WiFi calling:

• It’s free — calls and texts over WiFi are charged at the same rate as normal mobile calls (included in your plan allowance)
• It uses your normal number — the person you’re calling sees your regular mobile number, not a different one
• No app needed — it’s built into your phone’s operating system. You just need to enable it in settings
• It works with your existing plan — no need to change tariff or add a bolt-on
• Calls can seamlessly hand over — if you start a call on WiFi and walk outside, it can switch to mobile signal without dropping
• Emergency calls work — you can call 999/112 over WiFi calling, though location accuracy may be reduced

How to Enable WiFi Calling on Samsung

Samsung is the most popular Android brand in the UK, and WiFi calling setup is straightforward. These steps work on all recent Samsung Galaxy phones including the S24, S23, A-series, and Z Fold/Flip models.

Step-by-step instructions:

1. Open the Settings app
2. Tap Connections
3. Tap WiFi Calling
4. Toggle WiFi Calling to On
5. You may see a terms and conditions screen from your network — accept to continue
6. Choose your preference: “WiFi Preferred” (recommended) or “Mobile Network Preferred”

Samsung WiFi Calling settings explained:

• WiFi Preferred — your phone will use WiFi for calls whenever connected to WiFi, even if mobile signal is available. Best for homes and offices with poor signal.
• Mobile Network Preferred — your phone only uses WiFi calling when mobile signal is too weak. Best if you have generally good mobile signal and only want WiFi calling as a backup.

For a more detailed Samsung walkthrough with screenshots, see our dedicated WiFi calling on Android guide.

How to Enable WiFi Calling on iPhone

Apple has supported WiFi calling since the iPhone 5c. All current iPhones (iPhone 12 and newer) support it on all four UK networks.

Step-by-step instructions:

1. Open the Settings app
2. Tap Phone
3. Tap WiFi Calling
4. Toggle WiFi Calling on This iPhone to On
5. You may be asked to confirm your emergency address — enter your home or office address
6. If you have an Apple Watch, you’ll also see an option to enable WiFi calling on your watch

iPhone WiFi Calling tips:

• When WiFi calling is active, you’ll see “WiFi” in the status bar next to your network name
• If you have Dual SIM (physical + eSIM), you can enable WiFi calling for both lines independently
• WiFi calling works on FaceTime Audio calls too
• On iOS 17+, WiFi calling preferences are under Settings → Mobile Service → WiFi Calling

For a detailed iPhone walkthrough, see our WiFi calling on iPhone guide.

How to Enable WiFi Calling on Other Android Phones

The steps vary slightly by manufacturer, but the general process is similar:

Google Pixel

1. Settings → Network & Internet → SIMs → [Your SIM]
2. Toggle WiFi Calling on

OnePlus

1. Settings → WiFi & Network → SIM & Network → [Your SIM]
2. Toggle WiFi Calling on

Xiaomi / Redmi

1. Settings → SIM Cards & Mobile Networks → [Your SIM]
2. Toggle Make Calls Using WiFi on

Huawei / Honor

1. Settings → Mobile Network → WiFi Calling
2. Toggle on

UK Network WiFi Calling Support

All four major UK networks support WiFi calling, but there are differences in how they implement it:

WiFi Calling for Business

WiFi calling is particularly valuable for businesses, especially those in buildings with poor mobile signal. Here’s why every business should enable it:

Benefits for Business

• Never miss a client call — even in basements, warehouses, or buildings with thick walls
• No additional cost — calls use your existing business plan allowance
• Works with existing numbers — clients call your normal mobile number
• Reduces need for desk phones — with reliable WiFi calling, many businesses can go mobile-only
• International savings — staff travelling abroad can call UK numbers at local rates over hotel WiFi

Setting Up WiFi Calling Across Your Business

1. Ensure your WiFi can handle it — each WiFi call uses about 1 Mbps. For 20 simultaneous calls, you need at least 20 Mbps dedicated bandwidth.
2. Check router QoS settings — enable Quality of Service to prioritise voice traffic over general browsing
3. Enable on all devices — use your MDM (Mobile Device Management) to push WiFi calling settings to all company phones
4. Test in all areas — walk through your premises making test calls to identify any WiFi dead spots

If your business has poor mobile signal and you’re considering switching networks, get a free quote from us. We’ll check coverage at your locations and recommend the best solution — which might be as simple as enabling WiFi calling on your current network.

WiFi Calling Problems? Troubleshooting Guide

WiFi calling is generally reliable, but issues can occur. Here are the most common problems and how to fix them:

WiFi Calling Not Working

• Check it’s enabled — go to your phone’s settings and verify WiFi calling is toggled on
• Restart your phone — this resolves most temporary issues
• Check your WiFi connection — WiFi calling needs a stable connection with at least 1 Mbps
• Update your phone software — outdated software can cause compatibility issues
• Re-insert your SIM card — remove and reinsert your SIM, then restart
• Contact your network — WiFi calling may need to be enabled on your account

Poor Call Quality on WiFi

• Check WiFi speed — run a speed test. You need at least 1 Mbps for clear calls
• Move closer to your router — weak WiFi signal causes choppy audio
• Reduce network congestion — if others are streaming video, it can affect call quality
• Enable QoS on your router — prioritise voice traffic in your router settings
• Try the 5GHz WiFi band — less congested than 2.4GHz, though shorter range

Calls Dropping When Switching Between WiFi and Mobile

• This is a handover issue — not all networks handle the transition smoothly
• EE and O2 have the best handover technology, seamlessly switching between WiFi and mobile mid-call
• Three’s handover is more limited — calls may drop when transitioning
• Stay on one connection — if you know you’ll be moving, start the call on mobile signal instead

WiFi Calling Not Available on My Phone

Not all phones support WiFi calling on all networks. If you can’t find the option:

• Check your network’s list of compatible devices on their website
• Ensure your phone software is fully updated
• Try a different SIM card to rule out SIM issues
• Contact your network — they may need to enable the feature on your account

WiFi Calling vs VoIP Apps (WhatsApp, Teams, etc.)

You might wonder why you need WiFi calling when apps like WhatsApp and Microsoft Teams can also make calls over WiFi. Here’s the difference:

WiFi calling is the better choice for regular phone calls because it’s transparent — the other person doesn’t need any special app, and your caller ID works normally. VoIP apps are better for team collaboration and video calls.

Frequently Asked Questions

Does WiFi calling cost extra?

No. WiFi calls and texts are charged at the same rate as normal mobile calls — they come out of your plan’s inclusive minutes and texts. If you have unlimited calls, WiFi calls are unlimited too.

Does WiFi calling use my data allowance?

No. WiFi calling uses your WiFi/broadband connection, not your mobile data. It doesn’t count towards your mobile data allowance.

Can I use WiFi calling abroad?

Yes, and it’s a great way to save money. When connected to WiFi abroad, calls to UK numbers are charged at your normal UK rate — not roaming rates. This works in hotels, airports, cafes — anywhere with WiFi.

Does WiFi calling work with all phones?

Most phones from 2018 onwards support WiFi calling, but it depends on both your phone model and your network. Check your network’s website for a list of compatible devices.

Is WiFi calling as good as normal calls?

In most cases, yes. WiFi calling uses HD Voice technology, so call quality is often better than a regular mobile call — as long as your WiFi connection is stable and fast enough (1 Mbps minimum).

Can I use WiFi calling on my Samsung Galaxy?

Yes. All Samsung Galaxy phones from the S7 onwards support WiFi calling on UK networks. Go to Settings → Connections → WiFi Calling to enable it. See the detailed Samsung instructions above.

Why does my iPhone say “WiFi” next to the network name?

This means WiFi calling is active and your phone is currently routing calls through WiFi rather than mobile signal. This is normal and means the feature is working correctly.