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Three APN Settings Samsung — Quick Guide

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Three APN Settings Samsung guide with steps, settings, troubleshooting, FAQs and related UK mobile network fixes.

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Finding APN settings on Samsung (Three APN Settings Samsung — Quick Guide)

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If your internet connection is slow or mobile data is not working properly, this Three APN Settings Samsung | UK Mobile guide will help you configure everything correctly.

Use this when a Three phone isn't behaving — setup, signal and data covered.

No bars, slow data, hotspot failures, a blocked SIM, roaming trouble or a bad Three APN: work through the basics first.

A brief power cycle plus a short wait for reconnection usually fixes it.

The SIM should be active, with cellular data and roaming enabled anywhere the plan covers.

Check the Three APN entry in your mobile internet settings — it's easy for it to get wiped or saved wrong.

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Troubleshooting checklist

Following this order, Three issues rarely reach the last step

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

Entering Three APN values on Samsung — Three APN Settings Samsung — Quick Guide

Setting Value
APN Name3internet
Username(leave blank)
Password(leave blank)
MMSChttp://mms.um.three.co.uk:10021/mmsc
MMS Proxy193.113.200.195
MMS Port8799
Authentication TypeNone
APN Typedefault,supl,mms

Review the APN in Mobile Network or Cellular Data settings, save, reboot, then confirm browsing, MMS and hotspot function where available.

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Frequently Asked Questions About Three APN Settings Samsung — Quick Guide

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.