Three Voicemail Number

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 voicemail number on the Three network, including setup steps, troubleshooting tips and useful codes.

Setting up on Three (Three Voicemail Number)

Three's call and voicemail features are set through phone settings or short codes — the Three hub has plan-specific instructions.

Useful Three codes (Three Voicemail Number)

These standard GSM codes govern call forwarding and voicemail the same way on every UK network:

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.

Fixing common issues (Three Voicemail Number)

Call problems on Three: cycle aeroplane mode, restart the handset, and check signal strength. Persistent faults need the Three APN hub .

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Troubleshooting checklist

Most Three connection problems clear up within the first step or two below

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

Understanding WiFi calling (Three Voicemail Number)

WiFi calling routes calls and texts over WiFi rather than the mobile network — useful where Three signal is weak but WiFi is available. It uses your normal allowance.

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Troubleshooting checklist

WiFi Calling steps in when coverage drops, using your internet connection

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.

Enabling WiFi calling on an iPhone (Three Voicemail Number)

On iPhone: Settings → Phone → WiFi Calling, then enable it on this iPhone and confirm your emergency address. A WiFi icon shows in the status bar when active.

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Troubleshooting checklist

Poor signal hands calls to WiFi Calling over 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

Enabling WiFi calling on an Android phone (Three Voicemail Number)

Android: Settings → Network & Internet → Mobile Network → WiFi Calling. Samsung: Settings → Connections → Mobile Networks → WiFi Calling. Pixel: Settings → Network & Internet → Calls & SMS → WiFi Calling.

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Troubleshooting checklist

WiFi Calling covers weak-signal areas by routing calls over the internet

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

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Enable Wi-Fi Calling for better indoor coverage

Requirements for WiFi calling (Three Voicemail Number)

Requirements: a plan that supports WiFi calling (most UK plans do), a compatible device, and a WiFi connection. iPhone users may need a carrier settings update via Settings → General → About.

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Troubleshooting checklist

Where Three coverage is thin, WiFi Calling carries the call 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

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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.

When WiFi calling won't work (Three Voicemail Number)

Greyed out? The device or plan may not support WiFi calling — check with Three that it's enabled.

Dropped calls during WiFi-to-mobile handover are normal; staying on one connection avoids it.

Bad WiFi call quality: move nearer the router, check upload speed (1Mbps minimum), and restart the router.

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Troubleshooting checklist

The first couple of steps below resolve most Three faults

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 Voicemail Number

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 Voicemail Number