on 03-07-2019 06:33
The best way to get an answer on that would be to ask O2 https://community.o2.co.uk/t5/Welcome-News/How-to-find-help-amp-contact-O2-A-Guide/m-p/1201413#M2924...
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone7 (EE)
on 03-07-2019 07:59
If O2 don't stock the one you want you could always buy direct from Apple and still use it with O2