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O2 eSIM Setup

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O2 eSIM Setup guide with steps, settings, troubleshooting, FAQs and related UK mobile network fixes.

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Diagnosing SIM card error messages

Device O2 eSIM Support Min. iOS / Android Version
iPhone 16 / 15 / 14✓ SupportediOS 16 or later
iPhone XS / XR / 11 / 12 / 13✓ SupportediOS 12.1 or later
Samsung Galaxy S24 / S23 / S22✓ SupportedAndroid 11 or later
Google Pixel 7 / 6 / 5 / 4✓ SupportedAndroid 10 or later
iPhone 8 / X and older✗ Not supportedPhysical SIM only

An eSIM does away with the plastic card entirely, living inside the phone itself. The O2 profile downloads over Wi-Fi or mobile data, and once active behaves exactly like a physical SIM for calls, texts and data.

O2 eSIM support spans iPhone XS onward, Pixel 3 onward, Galaxy S20 onward, and most recent Android flagships — dual SIM phones can run a physical SIM and an eSIM together.

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eSIM setup checklist

Buying through to activating an O2 eSIM

Step 1Use Wi-FiStep 2Scan QR codeStep 3Activate lineStep 4Set data SIMStep 5Restart phone

Fixing SIM not detected on Android (O2 eSIM Setup)

Have a solid Wi-Fi connection ready, plus the O2 eSIM QR code — typically emailed or shown in the O2 app or account portal after ordering.

iPhone: Settings → Mobile Data → Add eSIM, then Use QR Code and scan the one O2 sent. The prompts afterwards cover labelling the line and primary/secondary status.

Android/Samsung: Settings → Connections → SIM Card Manager → Add Mobile Plan, then scan O2's QR code when asked. Pixel owners use Settings → Network & Internet → SIMs → Add eSIM.

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eSIM setup checklist

Purchase to activation on an O2 eSIM

Step 1Use Wi-FiStep 2Scan QR codeStep 3Activate lineStep 4Set data SIMStep 5Restart phone

Fixing SIM not recognised on iPhone — O2 eSIM Setup

Once scanned, the O2 eSIM profile downloads automatically — usually one to five minutes. Keep Wi-Fi on throughout, and O2's network name should appear in the status bar when done.

A failed O2 eSIM activation usually comes down to an incompatible device, eSIM not enabled on the account, or a QR code already used — each one is single-use, and O2 can reissue it.

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eSIM setup checklist

From buying an O2 eSIM to switching it on

Step 1Use Wi-FiStep 2Scan QR codeStep 3Activate lineStep 4Set data SIMStep 5Restart phone
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Fastest way to apply new APN settings
After saving, turn aeroplane mode ON for 10 seconds, then turn it OFF. This forces an immediate network re-registration — quicker than a full restart and equally effective.

When to replace your SIM card (O2 eSIM Setup)

O2 eSIM stuck at activation: check Wi-Fi is connected, restart the phone, then retry from Settings → Mobile Data.

No bars once the eSIM is active: toggle aeroplane mode off and on. Still nothing? Check Settings → Mobile Data to confirm the O2 eSIM line is set as the active data SIM.

eSIM gone after a factory reset: some devices wipe eSIM profiles during a reset, so O2 will need to re-provision it with your account details to hand.

Moving an O2 eSIM to a new phone isn't a re-scan job — it needs the O2 app or a call to support, since the original code is single-use.

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Troubleshooting checklist

The answer is normally in the first two steps for O2 users

Step 1Check APNStep 2Select APNStep 3Toggle flight modeStep 4Restart phoneStep 5Test data

eSIM vs physical SIM on O2 (O2 eSIM Setup)

Speed and coverage are identical between an O2 eSIM and a physical card — both reach the full network. eSIM's edge is convenience: no plastic, instant activation, no swap to change lines. Physical SIMs only win on older, eSIM-incompatible phones.

Related guides

O2 eSIM Not WorkingO2 eSIM SetupHow to Activate O2 eSIMO2 APN SettingsO2 MMS SettingsO2 APN Settings for RoamingO2 APN Settings Not WorkingO2 5G APN Settings
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eSIM setup checklist

O2 eSIM purchase through to activation

Step 1Use Wi-FiStep 2Scan QR codeStep 3Activate lineStep 4Set data SIMStep 5Restart phone

📚 Related O2 Guides

Frequently Asked Questions About O2 eSIM Setup

How do I activate my O2 eSIM?
To activate your O2 eSIM: order the eSIM from O2, then scan the QR code from your email in Settings → Mobile Data → Add eSIM (iPhone) or Settings → SIM Manager → Add SIM (Android).
Which phones support O2 eSIM in the UK?
O2 eSIM works on iPhone XS and later, Samsung Galaxy S20 and later, Google Pixel 3 and later, and most modern Android phones released after 2020.
Can I use O2 eSIM and a physical SIM at the same time?
Yes, most modern phones support dual SIM — one physical SIM and one eSIM. You can use your O2 eSIM alongside another carrier's physical SIM.
What do I do if my O2 eSIM QR code is not working?
If the O2 eSIM QR code fails, contact O2 customer support to request a new QR code. Make sure you are scanning it on the device you want to activate — eSIM QR codes are single-use.
Does O2 eSIM support 5G?
Yes, O2 eSIM supports 5G on compatible devices. Ensure your phone is 5G-capable and your O2 plan includes 5G access.