How to Set Up Call Forwarding

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

This guide covers everything you need to know about how to set up call forwarding on your mobile network, including setup steps, troubleshooting tips and useful codes.

Setting up on your mobile network (How to Set Up Call Forwarding)

Most of these features are set via phone settings or dial codes, with plan-specific instructions kept current on the UK APN Hub.

Useful mobile network codes (How to Set Up Call Forwarding)

Standard GSM codes cover call forwarding and voicemail the same way on all 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.

Common problems and fixes (How to Set Up Call Forwarding)

For calls not working right, try aeroplane mode, restarting, and checking signal — persistent trouble goes to the UK APN Hub.

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Troubleshooting checklist

Go in order instead of jumping straight to the final step

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

Related: What is WiFi calling? (How to Set Up Call Forwarding)

WiFi calling substitutes WiFi for mobile signal on calls and texts, handy wherever coverage is poor but WiFi is available, whether at home, work or travelling, using regular minutes and texts.

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Troubleshooting checklist

If signal drops out, WiFi Calling reroutes voice calls over 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

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.

Related: How to enable WiFi calling on iPhone (How to Set Up Call Forwarding)

Settings → Phone → WiFi Calling on iPhone lets you enable it and confirm the emergency address, after which a WiFi icon appears in the status bar.

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Troubleshooting checklist

WiFi Calling covers dropped signal by routing calls over 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

Related: How to enable WiFi calling on Android (How to Set Up Call Forwarding)

On the majority of Android devices it's under Settings → Network & Internet → Mobile Network; Samsung Galaxy and Pixel differ in their menu structure.

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Troubleshooting checklist

WiFi Calling takes over on broadband if mobile signal fails entirely

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

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Enable Wi-Fi Calling for better indoor coverage

Related: WiFi calling requirements (How to Set Up Call Forwarding)

Needed: a supporting plan (standard on most current UK tariffs), a compatible device, and WiFi access — iPhone users may see a carrier update prompt at Settings → General → About.

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Troubleshooting checklist

WiFi Calling sends voice calls to broadband the instant signal drops out

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.

Related: Troubleshooting WiFi calling not working (How to Set Up Call Forwarding)

Unsupported device or plan is the usual cause of a greyed-out option — confirm with the provider that it's enabled.

A dropped call during handover between WiFi and mobile is normal — one steady connection prevents it.

Bad WiFi call quality usually needs router proximity, an upload speed check (1Mbps minimum), and a restart.

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Troubleshooting checklist

Go through in order instead of jumping to the last step

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 How to Set Up Call Forwarding

How do I contact your network UK support?

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

How do I check my your network 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 your network has no service?

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

How do I keep my number when switching to your network?

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

Does your network support WiFi calling?

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

How to Set Up Call Forwarding