What are O2 APN settings?
| 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 |
Access Point Name (APN) is what lets a handset reach O2 for internet, picture messaging and tethering. Incorrect settings leave the SIM registered but unable to load anything.
These are O2's recommended APN settings across Android and iPhone: name, username, password, MMSC, MMS proxy, port. If data shows connected but nothing loads, start here.
How to find APN settings on Android on O2
Recent Android versions keep it at Settings → Network & Internet → Mobile Network → Access Point Names — Connections on a Samsung. Plus icon adds a profile; tapping one edits it.
On a Samsung, it's Settings → Connections → Mobile Networks → Access Point Names for O2. Xiaomi and Redmi route through Settings → SIM cards & Mobile Networks → Access Point Names instead.
Troubleshooting checklist
The Android path to O2's APN screen, plus what belongs in every field
How to find APN settings on iPhone on O2
For iOS 16 onward: Settings → Mobile Data → Mobile Data Network. If it isn't there, O2 handles the APN itself. Restore O2's default configuration through Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings.
On certain recent iPhones, O2's carrier bundle locks the APN field. Only an O2-side carrier settings update will change it.
Troubleshooting checklist
Finding O2's APN screen on iPhone, plus why fields sometimes grey out
Recommended O2 APN settings
Fill in O2's APN settings screen with these values, leaving anything not listed blank. Save once entered, restart, then select the new profile.
Troubleshooting checklist
The iPhone location for O2's APN screen, and why fields grey out
Troubleshooting O2 APN issues (iPhone 16)
O2 APN entered but still no data? These are worth trying in sequence:
1. Switch aeroplane mode on for ten seconds and back off, forcing the handset to rejoin O2's network and reload the APN.
2. Give the phone a full restart — it flushes temporary glitches and locks in the updated APN.
3. Wipe the APN and start over. A single incorrect character in the name or MMSC address is a common cause of failure — delete it and re-enter all values fresh.
4. Reset the network settings entirely. Android: Settings → General Management → Reset → Reset Network Settings; iPhone: Settings → General → Reset → Reset Network Settings. Saved Wi-Fi and Bluetooth go, with O2's defaults restored.
5. Look at the account side. SIM activation, account status and remaining data allowance are all checkable through the O2 hub or customer services.
Troubleshooting checklist
Try these O2 steps in sequence; the fix is usually near the top of the list
• 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 16)
MMS on O2 depends on dedicated APN fields — MMSC, MMS proxy and MMS port. Failures to send or download usually trace back to these. Certain Android phones also need a standalone MMS APN entry.
MMS setup checklist
Copy O2's MMSC precisely; the http:// prefix is required and https:// stops MMS working
Frequently Asked Questions About O2 APN Settings iPhone 16
Will changing APN settings delete anything?
Nothing personal is affected. The APN governs only the O2 data and MMS connection, and resetting to defaults is always available.
Do I need to enter APN settings on an eSIM?
Most O2 eSIM profiles configure the APN themselves. Should data fail regardless, the manual steps above will set it correctly.
Why is my O2 APN greyed out?
Certain devices and SIM types have their APN field locked down by O2. On Android, look under Settings → Network & Internet → Mobile Network for reset APNs. On iPhone, only O2 can change it via a carrier bundle update.