on 13-05-2019 08:48
@Larry how to unlock here https://community.o2.co.uk/t5/How-to-Guides/Unlocking-an-O2-phone-to-use-a-different-SIM-card/ba-p/1... but have you tried a different SIM card already as it may not be locked?
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 13-05-2019 14:05
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
on 13-05-2019 14:29
Try a sim card from the other networks and let us know the message you get.
on 14-05-2019 10:32
Good morning @Larry, I was wondering how you were getting on with your handset since you last posted?
There's a lot of advice above, so it'd be great if you could have a look and let us know if you need some more help at all
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