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Three MMS Settings UK 2026 MMS

Three MMS settings enable picture messaging on Three's network. The Three MMSC is http://mms.three.co.uk:10021/mmsc and the MMS Proxy is 212.137.86.109 on port 8799. Three uses the same APN (three.co.uk) for both internet and MMS — no separate MMS-only APN is required.

📋 On this page

  1. Three MMS Settings Table
  2. Android Setup
  3. iPhone Notes
  4. Troubleshooting
  5. FAQs

Three MMS Settings

Enter these values in your APN profile to enable picture messaging. All values must be exact.

FieldValue
APNthree.co.uk
MMSChttp://mms.three.co.uk:10021/mmsc
MMS Proxy212.137.86.109
MMS Port8799
MCC234
MNC20
APN Typedefault,supl,mms
APN ProtocolIPv4/IPv6
⚠ MMS requires an active mobile data connection. Picture messages cannot be sent over Wi-Fi only.

Android MMS Setup — Three

  1. Open Settings › Connections (Samsung) or Network & internet (Pixel) › Mobile Networks.
  2. Tap Access Point Names. Find your existing Three APN or tap + to create a new one.
  3. Set APN: three.co.uk.
  4. Enter MMSC: http://mms.three.co.uk:10021/mmsc.
  5. Enter MMS Proxy: 212.137.86.109 and MMS Port: 8799.
  6. Set APN Type: default,supl,mms. On Three, set APN Type to default,supl,mms in the three.co.uk APN profile. No separate MMS APN is needed. Three's APN requires no username or password.
  7. Tap ⋮ › Save, activate the profile, then restart your phone.

Three MMS on iPhone

iPhones on Three receive MMS settings via the carrier bundle automatically. If picture messages fail, update carrier settings via Settings › General › About, then restart.

  1. Go to Settings › General › About and install any available carrier update.
  2. Toggle Aeroplane Mode on for 15 seconds, then off.
  3. Open your messaging app and confirm MMS Messaging is enabled in Settings › Messages.
  4. Restart the iPhone if picture messages still fail.

Troubleshooting Three MMS

  1. Check mobile data is active — MMS requires a data connection, not just Wi-Fi.
  2. Verify the MMSC is set to http://mms.three.co.uk:10021/mmsc exactly.
  3. Check MMS Port is 8799 — wrong port is a common failure cause.
  4. Check APN Type includes mms (e.g. default,supl,mms).
  5. Enable MMS in your messaging app — most apps have an MMS toggle in their settings.
  6. Restart your phone after saving APN changes to apply them.
  7. Reset network settings and re-enter the values manually if the above steps fail.

Frequently Asked Questions — Three MMS

What is the Three MMSC address?
The Three MMSC is http://mms.three.co.uk:10021/mmsc. MMS Proxy: 212.137.86.109, Port: 8799.
Why aren't Three picture messages working?
Check that mobile data is active, the MMSC address is correct, port is 8799, and the APN Type includes mms in the three.co.uk profile.
Does Three MMS need credentials?
No. Three's APN (three.co.uk) is an open APN — no username or password is required for internet or MMS.
Does Three use port 8080 or 8799 for MMS?
Three uses port 8799 for MMS, along with most Three-network MVNOs including SMARTY and iD Mobile.
What is the Three MMS Proxy?
The Three MMS Proxy is 212.137.86.109, Port 8799.

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