Three Call Forwarding Code

Step	Action	What It Fixes
1	Check Three network status	Confirms if issue is network-wide
2	Toggle aeroplane mode on/off	Re-registers SIM on Three network
3	Restart your phone	Clears temporary network errors
4	Check Three APN settings	Fixes incorrect data configuration
5	Re-insert SIM card	Fixes poor SIM contact issues
6	Contact Three support	Resolves account or SIM faults

This guide covers everything you need to know about three call forwarding code on the Three network, including setup steps, troubleshooting tips and useful codes.

Setting up on Three (Three Call Forwarding Code)

Configure Three call and voicemail options via your phone settings or dial codes; check the hub for current details.

Useful Three codes (Three Call Forwarding Code)

These forwarding and voicemail codes are universal GSM standards across UK networks:

Divert all calls: Dial **21*[number]# and press call.

Divert when busy: Dial **67*[number]# and press call.

Divert when no answer: Dial **61*[number]# and press call.

Cancel all diversions: Dial ##002# and press call.

Check voicemail: Hold down the 1 key or dial your voicemail number.

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Fastest way to apply new APN settings

After saving, turn aeroplane mode ON for 10 seconds, then turn it OFF. This forces an immediate network re-registration — quicker than a full restart and equally effective.

If something's not working (Three Call Forwarding Code)

When Three calls misbehave, try an aeroplane mode toggle, a restart and a signal check before consulting the Three APN hub .

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Troubleshooting checklist

The list runs quick-to-thorough for Three users

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

WiFi calling explained (Three Call Forwarding Code)

Instead of the mobile network, WiFi calling carries calls and texts over your WiFi connection, drawing on your existing minutes and texts.

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Troubleshooting checklist

WiFi Calling moves things onto broadband the moment signal can't cope

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

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Enable Wi-Fi Calling for better indoor coverage

iPhone: Settings → Mobile Data → Wi-Fi Calling → On
Android (Samsung): Settings → Connections → Mobile Networks → Wi-Fi Calling → On
No extra charge — uses your existing call and text allowance. Ideal where indoor mobile signal is weak.

Setting up WiFi calling on iPhone (Three Call Forwarding Code)

iPhone users enable it under Settings → Phone → WiFi Calling; an emergency address is required, and the status bar confirms when it's on.

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Troubleshooting checklist

WiFi Calling moves the call to broadband when Three signal can't carry it

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

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Enable Wi-Fi Calling for better indoor coverage

Setting up WiFi calling on Android (Three Call Forwarding Code)

Most Android phones put it under Settings → Network & Internet → Mobile Network → WiFi Calling; Samsung and Pixel differ slightly.

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Troubleshooting checklist

When mobile signal fails, WiFi Calling hands the call to your broadband

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

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Enable Wi-Fi Calling for better indoor coverage

What's needed before enabling WiFi calling (Three Call Forwarding Code)

You'll need WiFi calling support on both plan and device, plus an active WiFi connection. On iPhone, accept any carrier update prompt under Settings → General → About.

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Troubleshooting checklist

Calls switch to broadband via WiFi Calling where Three signal is too weak

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

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Enable Wi-Fi Calling for better indoor coverage

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Fastest way to apply new APN settings

After saving, turn aeroplane mode ON for 10 seconds, then turn it OFF. This forces an immediate network re-registration — quicker than a full restart and equally effective.

Resolving WiFi calling problems (Three Call Forwarding Code)

If the option is unavailable, WiFi calling may not be supported or enabled on the account.

Handover between WiFi and Three can drop calls — remain on one network to avoid it.

If WiFi calls sound poor, get closer to the router and verify at least 1Mbps upload.

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Troubleshooting checklist

Quickest Three checks first, more involved ones below

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

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Enable Wi-Fi Calling for better indoor coverage

Frequently Asked Questions About Three Call Forwarding Code

How do I contact Three UK support?

You can contact Three UK customer support through their official website, via live chat, by phone, or through their social media channels.

How do I check my Three signal strength?

Check your phone's signal bars in the status bar. For a detailed reading, go to Settings → About Phone → Status (Android) or dial *3001#12345#* (iPhone) to open Field Test mode.

What should I do if Three has no service?

If Three shows no service, try toggling Aeroplane Mode on and off, restarting your phone, and checking the Three coverage map for your area. If the issue persists, contact Three support.

How do I keep my number when switching to Three?

To keep your number when switching to Three, request a PAC code from your current provider by texting 'PAC' to 65075. You can then give this code to Three when you set up your new account.

Does Three support WiFi calling?

Many Three plans support WiFi calling. Check your Three account settings or the Three website to see if WiFi calling is available on your plan and how to enable it.

Three Call Forwarding Code