M1 APN Settings 2026 - 5G & 4G LTE Guide
Configure M1 mobile data settings on Android and iOS
Manually configure your M1 APN settings to enable 5G or 4G LTE mobile data and MMS in Singapore. The default APN for M1 internet access is 'sunsurf' with username '65' and password 'user123'. M1 Limited operates on MCC 525 and MNC 03 as one of Singapore's three major mobile operators. Devices brought from overseas or unlocked phones may require manual APN entry to connect.
M1 APN Settings
Use these settings to configure your M1 mobile data connection.
| Setting | Value |
|---|---|
| APN | sunsurf |
| MCC | 525 |
| MNC | 03 |
| Authentication | PAP |
| APN Type | default,supl,mms |
| APN Protocol | IPv4/IPv6 |
| Username | 65 |
| Password | user123 |
How to Configure M1 APN on Android
- 1 Open Settings on your Android device.
- 2 Go to Network & Internet or Connections.
- 3 Tap Mobile Network or Mobile Data.
- 4 Select Access Point Names (APN).
- 5 Tap the + icon to add a new APN.
- 6 Set Name to 'M1 Sunsurf' and APN to 'sunsurf'.
- 7 Enter Username as '65' and Password as 'user123'.
- 8 Enter MMSC as 'http://mmsgw:8002' and MMS Proxy as '172.16.14.10' with MMS Port '8080'.
- 9 Set Authentication Type to 'PAP' and APN Type to 'default,supl,mms'.
- 10 Tap Save and select the new M1 APN from the list.
- 11 Restart your device to apply the settings.
How to Configure M1 APN on iPhone/iOS
- 1 Open Settings on your iPhone.
- 2 Tap Cellular or Mobile Data.
- 3 Select Cellular Data Network.
- 4 Enter 'sunsurf' in the APN field under Cellular Data.
- 5 Enter '65' as Username and 'user123' as Password.
- 6 Under MMS, enter APN as 'sunsurf' and MMSC as 'http://mmsgw:8002'.
- 7 Set MMS Proxy to '172.16.14.10:8080'.
- 8 Go back to save the settings.
- 9 Restart your iPhone to apply changes.
Troubleshooting
Common issues and solutions when configuring M1 APN settings.
- No data connection on M1 SIM
- Ensure the APN is 'sunsurf' with username '65' and password 'user123'. M1 requires authentication unlike most Singapore carriers. Set Authentication Type to PAP. Toggle Airplane Mode on and off after saving. Reset network settings if the problem continues.
- MMS failing on M1 network
- Verify MMSC is 'http://mmsgw:8002' and MMS Proxy is '172.16.14.10' with port '8080'. Mobile data must be active for MMS. The MMS APN name for M1 is 'miworld' if your device uses separate APN entries for data and MMS.
- Authentication error on M1 APN
- Set Authentication Type to PAP (not CHAP or None). Enter username as '65' and password as 'user123' exactly. These credentials are case-sensitive. Delete any existing M1 APN profiles and create a fresh one with the correct credentials.
M1 APN Settings FAQ
What is the correct M1 APN for Singapore?
The correct APN for M1 internet in Singapore is 'sunsurf'. Unlike other Singapore operators, M1 requires authentication credentials - username '65' and password 'user123'. The MMS APN can also use 'miworld' on devices that require separate data and MMS access points. Both APNs connect to the M1 mobile network.
What are the M1 MCC and MNC codes?
M1 uses MCC 525 (Singapore country code) and MNC 03 (M1 network identifier). These values are automatically read from the SIM card by your device. You typically do not need to enter them manually unless the fields are empty in your APN settings. The MCC/MNC combination uniquely identifies the M1 network globally.
Why does M1 APN need a username and password?
M1 uses PAP authentication for its mobile data service, which requires the username '65' and password 'user123'. These are universal credentials shared by all M1 subscribers and are not specific to your personal account. The authentication adds a layer of network access control. Without these credentials, your device cannot establish a data session on the M1 network.
What is the M1 MMS APN name?
The M1 MMS APN name is 'miworld' for devices that use separate APN entries for data and MMS. On devices that combine both in a single APN profile, use 'sunsurf' with the MMSC URL 'http://mmsgw:8002'. The MMS proxy is '172.16.14.10' and MMS port is '8080'. Username and password remain '65' and 'user123' respectively.
How do I fix M1 5G not working?
Ensure your M1 plan supports 5G access and your device is 5G-compatible with Singapore bands (n78 at 3500 MHz). Check that your SIM card is a 5G-enabled SIM by visiting an M1 store. Set your preferred network type to 5G/NR in device settings. The APN 'sunsurf' works for both 4G and 5G connections without any additional configuration changes.