Understanding network lock and SIM lock (How to Activate O2 eSIM)
| Device | O2 eSIM Support | Min. iOS / Android Version |
|---|---|---|
| iPhone 16 / 15 / 14 | ✓ Supported | iOS 16 or later |
| iPhone XS / XR / 11 / 12 / 13 | ✓ Supported | iOS 12.1 or later |
| Samsung Galaxy S24 / S23 / S22 | ✓ Supported | Android 11 or later |
| Google Pixel 7 / 6 / 5 / 4 | ✓ Supported | Android 10 or later |
| iPhone 8 / X and older | ✗ Not supported | Physical SIM only |
Rather than a removable plastic card, an eSIM is built into the phone's hardware. The O2 profile downloads over Wi-Fi or mobile data, then works exactly like a physical SIM for calls, texts and data.
Compatibility covers iPhone XS and later, Pixel 3 and later, Galaxy S20 and later, and most modern Android flagships, with dual SIM devices running both types at once.
eSIM setup checklist
The route from buying to browsing on O2
Inspecting the SIM for damage (How to Activate O2 eSIM)
You'll need reliable Wi-Fi and the O2 eSIM QR code, which arrives by email or appears in the O2 app or account portal post-order.
iPhones: Settings, Mobile Data, Add eSIM, Use QR Code — scan the code O2 issued, then follow prompts to label it and set SIM priority.
Android route: Settings → Connections → SIM Card Manager → Add Mobile Plan, scanning O2's QR on request; Pixel uses Settings → Network & Internet → SIMs → Add eSIM.
eSIM setup checklist
From O2 purchase to a working browser
Resetting network settings to fix SIM errors (O2)
Scanning triggers an automatic download of the O2 eSIM profile — generally one to five minutes with Wi-Fi active. O2 shows in the status bar once complete.
When activation fails, check device compatibility, whether eSIM is enabled on the O2 account, and whether the QR code has been used before — each code works only once.
eSIM setup checklist
Buying an O2 eSIM through to browsing
Contacting O2 about SIM issues
If the O2 eSIM won't activate, verify the Wi-Fi connection, restart, and try once more from Settings → Mobile Data.
If there's no signal after activating, try aeroplane mode on then off. Failing that, verify in Settings → Mobile Data that O2 is the one set for data.
A reset can take the eSIM profile with it on certain phones. Contact O2 to have it re-provisioned; have account details ready.
An O2 eSIM doesn't transfer by re-scanning — the O2 app or support team handles moving it to a new device.
Troubleshooting checklist
The fastest checks sit at the top of this O2 list, with more involved ones below — start there
eSIM vs physical SIM on O2 — during activation
No speed or coverage gap between O2's eSIM and a physical SIM. eSIM offers more convenience: no plastic, instant activation, no swap for line changes. Physical SIMs remain necessary only on older, incompatible handsets.
eSIM setup checklist
The path from O2 order to internet access