on 07-01-2020 22:35
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 12-01-2020 19:00
Best option to be honest. Try some free other network sim cards in your phone. I wouldn't be struggling with O2 if they can't help sort their network out in your dstrict.