| 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 |
• 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
What are Three MMS settings?
MMS (Multimedia Messaging Service) lets you send picture messages, video clips and audio files as text messages. To send and receive MMS on Three, your phone needs the correct MMSC address, MMS proxy and MMS port values configured in the APN settings. Without these, picture messages may fail to send, download or appear as empty boxes.
MMS setup checklist
Three's MMSC requires http://; https:// stops MMS entirely
• 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
Android MMS configuration (Three)
Go to Settings → Connections → Mobile Networks → Access Point Names. Tap your existing Three APN or create a new one. Fill in the MMSC field, the MMS Proxy field, and the MMS Port field with Three values. Make sure the APN Type field includes mms (for example: default,supl,mms). Save and restart.
MMS setup checklist
Use http:// for the MMSC — the secure prefix breaks Three picture messaging
• 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
iPhone MMS configuration (Three)
On iPhone, MMS settings are part of the mobile data network settings at Settings → Mobile Data → Mobile Data Network. Scroll down to the MMS section and enter Three MMSC, MMS Proxy and MMS Max Message Size values. Tap the back arrow to save.
If the MMS section is missing on iPhone, go to Settings → Messages and make sure MMS Messaging is toggled on. If it remains greyed out, your iPhone carrier bundle may need updating — contact Three.
MMS setup checklist
The MMSC address needs http://, and an accidental https:// kills MMS
Troubleshooting Three MMS problems
If picture messages fail to send, verify mobile data is enabled, the MMSC and MMS proxy are correct, and mms is included in the APN type.
Not downloading? Try tapping the message to trigger it manually, verify mobile data is active, and look for an Auto-retrieve MMS setting.
If MMS arrives blurry, it's typically the sending device compressing the photo — WhatsApp or iMessage often preserve quality better.
Troubleshooting checklist
Try these Three steps in sequence; the fix is usually near the top of the list
MMS on Three vs iMessage/WhatsApp
MMS caps out around 300KB to 1MB and compresses images significantly. For better quality, iMessage, WhatsApp or Google Messages with RCS send over data instead, avoiding MMS compression entirely.