on 18-07-2017 13:35
It needs to be unlocked by the network it is locked to. If locked to O2 then follow this guide
on 18-07-2017 15:49
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone7 (EE)
on 19-07-2017 11:44
Hi @Anonymous welcome to the community! Is the phone locked to O2 network? Please see the guide linked to above and let us know how you get on.
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