Locating APN settings on iPhone (O2 APN Settings iPhone)
| Setting | Value |
|---|---|
| APN Name | mobile.o2.co.uk |
| Username | vertigo |
| Password | password |
| MMSC | http://mmsc.mms.o2.co.uk:8002 |
| MMS Proxy | 82.132.254.1 |
| MMS Port | 8080 |
| Authentication Type | PAP |
| APN Type | default,supl,mms |
APN, short for Access Point Name, is the string a phone uses to reach O2's network for data, MMS and hotspot. Without correct values, the SIM connects but web pages and picture messages fail.
O2's APN values for Android and iPhone are listed below — APN name, username, password, MMSC, MMS proxy and port. If the phone shows mobile data connected but no internet, the APN is the first thing to check.
Entering O2 APN values on iPhone
On newer Android builds, O2's APN screen sits at Settings → Network & Internet → Mobile Network → Access Point Names (Connections on Samsung). Use the plus icon to add a profile or tap an existing one to change it.
On a Galaxy phone, O2's APN screen sits at Settings → Connections → Mobile Networks → Access Point Names; Xiaomi and Redmi instead use Settings → SIM cards & Mobile Networks → Access Point Names.
Troubleshooting checklist
Where the O2 APN screen sits on Android, and which values go in each field
iPhone O2 mobile data not working after APN entry
On iOS 16 or later, head to Settings → Mobile Data → Mobile Data Network. If that option is absent, O2 is likely pushing APN settings automatically. A reset at Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings restores O2's default APN configuration.
A few recent iPhones on O2's carrier bundle show the APN field greyed out. When that happens, contact O2 support to update your carrier settings profile.
Troubleshooting checklist
Where iOS keeps O2's APN screen, and the reason certain fields lock
Does O2 automatically configure iPhone APN?
Fill the APN screen with O2's values below, skipping anything not listed. Save, reboot, and pick the new profile afterwards.
Troubleshooting checklist
iOS and O2's APN screen: where to find it and why fields lock
Troubleshooting O2 APN issues (iPhone)
If O2's APN values haven't fixed it, work through the following in order:
1. Toggle aeroplane mode — ten seconds on, then off. This forces a reconnect to O2 and re-registers the APN profile.
2. Restart the phone fully — this clears short-lived faults and applies the new O2 values properly.
3. Delete and re-enter the APN. One stray character in the O2 name or MMSC URL stops data working — remove the profile and retype every value.
4. Reset all network settings. Android: Settings → General Management → Reset → Reset Network Settings. iPhone: Settings → General → Reset → Reset Network Settings. Saved Wi-Fi passwords and Bluetooth pairings clear, and O2's defaults return.
5. Check the O2 account. Confirm the SIM is activated, the account is active, and the data allowance hasn't run out — via the O2 hub or customer services.
Troubleshooting checklist
On O2, most people are back online after the first couple of steps here
• 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
APN settings for MMS on O2 (iPhone)
O2's MMS runs through a separate set of fields within the APN profile — MMSC, MMS proxy and MMS port. If MMS isn't sending or downloading, check those first. A few Android phones need a completely separate MMS APN entry from the internet one.
MMS setup checklist
Copy O2's MMS fields character for character — the MMSC needs the plain http:// prefix, never https://
Frequently Asked Questions About O2 APN Settings iPhone
Will changing APN settings delete anything?
No — everything else on the phone stays as it was. This only governs how it connects to O2 for internet data and picture messages, and it can be reset at any time.
Do I need to enter APN settings on an eSIM?
In most cases, an O2 eSIM profile includes the right APN settings out of the box. That said, if mobile data isn't working, you may need to enter the APN values manually using the steps above.
Why is my O2 APN greyed out?
Some devices and SIM types ship with the APN field locked by O2. Greyed out on Android? Try Settings → Network & Internet → Mobile Network and look for a reset-APNs option. On iPhone it means O2's carrier bundle controls it — ask O2 for an APN update.