SMARTY APN Settings for UK

Runs on Three network 5G supported

Last verified: July 2025

SMARTY is a UK MVNO that runs on Three's network and is actually owned by Three's parent company, CK Hutchison Holdings. SMARTY is known for its transparent pricing model: it doesn't tie customers into long contracts, and it gives refunds for unused data at the end of each month. SMARTY supports 5G on compatible plans and devices, which is relatively unusual for a budget MVNO. SMARTY's APN — smarty.co.uk — is clean and simple, requiring no authentication credentials. SMARTY uses Three's MMS infrastructure, so the MMSC and proxy values are the same as Three's. SMARTY SIMs are managed entirely through the SMARTY website and app, with no physical stores.

SMARTY APN Settings

NameSMARTY
APNsmarty.co.uk
MMSChttp://mms.um.three.co.uk:10021/mmsc
MMS Proxymms.three.co.uk
MMS Port8799
MCC234
MNC20
Authentication typeNone
APN typedefault,supl,mms
ProtocolIPv4/IPv6

How to Set SMARTY APN on Android

  1. Open Settings on your Android phone.
  2. Tap Connections (Samsung) or Network & Internet (stock Android / Pixel).
  3. Tap Mobile networks.
  4. Tap Access Point Names (APN).
  5. Tap the ＋ (plus) button to add a new APN entry.
  6. Enter each value from the table above exactly as shown.
  7. Tap the ⋮ menu (three dots) then tap Save.
  8. Tap the radio button next to the new APN to select it.
  9. Restart your phone or toggle Aeroplane Mode on then off.

How to Set SMARTY APN on iPhone / iOS

  1. Open the Settings app.
  2. Tap Mobile Data (or Cellular).
  3. Tap Mobile Data Network (or Cellular Data Network).
  4. Under Mobile Data, enter the APN value shown in the table above.
  5. Scroll to the MMS section and enter the MMSC, MMS Proxy and MMS Port values.
  6. Press the Home button or swipe up — iOS saves automatically.
  7. Toggle Aeroplane Mode on for 10 seconds, then off.
  8. Test by opening a website in Safari.

Which Phones Do These Settings Work On?

SMARTY APN settings work on all Android phones (Android 8+) and iPhones (iOS 14+). SMARTY supports 5G on compatible plans and devices. For Android 12+: Settings → Network & Internet → SIMs → Access Point Names.

SMARTY APN Troubleshooting

Remove and reinsert your SIM. Contact SMARTY support through the app or website. SMARTY's customer service is entirely online and typically responds quickly via chat.
Confirm APN is smarty.co.uk and it's selected. No username or password is needed. Check your SMARTY plan is active and has remaining data. SMARTY's refund model means data resets monthly, so if you've just topped up check the data shows as available in the app.
SMARTY uses Three's MMS infrastructure. MMSC should be http://mms.um.three.co.uk:10021/mmsc, proxy mms.three.co.uk, port 8799. If the hostname proxy causes issues, try leaving it blank and using only the MMSC URL.
Contact SMARTY support via the app. SMARTY's online support team is responsive and can disable OTA configuration if needed.
Verify MCC 234 and MNC 20 (Three's identifiers). SMARTY is owned by Three but uses its own APN — the network identifiers remain Three's. Protocol should be IPv4/IPv6.
→ Three Mobile APN settings → iD Mobile APN settings → APN troubleshooting guide