Which Three APN profile gives fastest data speeds?
| Setting |
Value |
| APN Name | 3internet |
| Username | (leave blank) |
| Password | (leave blank) |
| MMSC | http://mms.um.three.co.uk:10021/mmsc |
| MMS Proxy | 193.113.200.195 |
| MMS Port | 8799 |
| Authentication Type | None |
| APN Type | default,supl,mms |
APN stands for Access Point Name, the configuration needed to reach Three for internet, MMS and tethering.
Here are the Three APN values for Android and iPhone. Connected-but-no-internet usually means an APN problem.
Comparing Three APN settings for different use cases
Modern Android puts Three's APN list at Settings → Network & Internet → Mobile Network → Access Point Names.
Galaxy: Settings → Connections → Mobile Networks → Access Point Names. Xiaomi/Redmi: Settings → SIM cards & Mobile Networks → Access Point Names.
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Troubleshooting checklist
Finding Three's APN settings on Android and completing them
Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data
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Saving an APN does not activate it — you must select it
On Android, after tapping Save the new APN appears in the list but is not yet active. Tap the radio button (empty circle) next to it so it becomes filled. The profile is only active when the circle is filled. Then toggle aeroplane mode or restart.
Optimising your Three APN for 4G and 5G
With iOS 16+, check Settings → Mobile Data → Mobile Data Network. No option usually means Three auto-configures it.
Certain new iPhones grey out the APN entirely under Three's bundle — support must push an update.
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Troubleshooting checklist
Finding Three's APN screen on iPhone, greyed-out fields explained
Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data
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APN field greyed out? Here is why
On Android: the field is locked by a carrier profile. Go to Settings → Network & Internet → Mobile Network → Access Point Names and tap Reset to Default (three-dot menu). On iPhone: the carrier bundle controls the APN — it cannot be edited manually. Contact your network to push an updated carrier profile, or insert the SIM in another phone to test.
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APN values are case-sensitive — enter them exactly
Type every character exactly as shown — no spaces before or after, no capital letters unless listed. One wrong character stops mobile data from working. After saving on Android, tap the radio button (filled circle) next to the new profile to activate it.
When to use Three internet APN vs MMS APN
Enter each Three value on the APN screen, leaving out anything not shown, then save and restart.
After saving your APN settings, always restart your phone and test a website before making further changes. If you have multiple APN profiles, make sure the correct one is selected (shown with a filled circle on Android).
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Troubleshooting checklist
The Android location of Three's APN screen, field by field
Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data
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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.
Troubleshooting Three APN issues
APN entered but still nothing on Three? These are worth trying next:
1. Start with an aeroplane mode toggle, which re-registers the APN on Three's network.
2. A full reboot clears temporary network faults and locks in the new values.
3. Delete the Three APN and enter every value again.
4. A complete network settings reset clears Wi-Fi and Bluetooth pairings but brings Three's defaults back.
5. Rule out an account issue: SIM activated, account active, allowance intact.
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Troubleshooting checklist
Start at step one — the list deepens as you continue
Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data
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Common MMS mistakes that stop picture messages working
• The MMSC URL must begin with http:// — never https://
• The MMS Proxy field is an IP address only — no http:// prefix
• APN Type must contain mms (e.g. default,supl,mms)
• On Android, save then select the profile before testing
APN settings for MMS on Three
Picture messaging uses its own MMSC, MMS proxy and MMS port fields inside the APN profile. If MMS won't send or download, check these first — a few Android phones need a completely separate MMS APN.
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MMS setup checklist
Three's MMSC needs the plain http:// prefix or MMS fails
Step 1Check MMSCStep 2Add MMS proxyStep 3Set APN typeStep 4Turn data onStep 5Send test MMS
Frequently Asked Questions About Best Three APN Settings
Will changing APN settings delete anything?
Nothing else is affected; the APN purely governs the Three data and MMS connection.
Do I need to enter APN settings on an eSIM?
eSIM profiles from Three generally include the right APN; if not, apply the values manually.
Why is my Three APN greyed out?
Three restricts APN editing on particular devices. Check Settings → Network & Internet → Mobile Network for reset APNs on Android; iPhone requires a Three profile update.
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APN field greyed out? Here is why
On Android: the field is locked by a carrier profile. Go to Settings → Network & Internet → Mobile Network → Access Point Names and tap Reset to Default (three-dot menu). On iPhone: the carrier bundle controls the APN — it cannot be edited manually. Contact your network to push an updated carrier profile, or insert the SIM in another phone to test.
More Best Three APN Settings Questions
What is the Three APN name?
The Three APN name is shown in the settings table above. On most Three SIMs in the UK, the APN is pre-configured automatically when you insert your SIM.
Why is my Three mobile data not working after entering the APN?
After entering the Three APN settings, restart your phone to apply the changes. If data still does not work, check you have selected the correct APN and that your Three plan includes mobile data.
Do I need to enter APN settings manually on Three?
Most Three devices configure APN settings automatically when you insert your SIM. You only need to enter them manually if your internet or MMS stops working after a factory reset or SIM swap.
What is the Three MMS APN for picture messages?
The Three MMS APN settings are included in the table above. Make sure the MMSC, MMS Proxy and MMS Port values are entered exactly as shown.
Can I use the same APN settings for 4G and 5G on Three?
Yes, the Three APN settings work for both 4G and 5G connections. You do not need a separate APN for 5G — the network upgrades automatically where 5G coverage is available.