on 02-10-2019 00:07
I believe it ppears on your second bill.
on 04-12-2019 03:24
on 04-12-2019 06:56
Just follow the process Guide: O2 Open & Friends and Family discounts - How to sign up but be aware that discount is not available with the 11 Pro currently https://www.o2.co.uk/open
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)