on 23-10-2019 05:58
@Ben6 Short answer is yes, you do. Your initial contract ended in June and you've been on a one month rolling contract since then, so you do need to cancel it. Please take a look at this guide to see what you need to do: https://community.o2.co.uk/t5/How-to-Guides/Cancelling-your-contract-An-updated-guide/ba-p/1234852
on 23-10-2019 06:55
You are free to leave whenever you wish. There are no notice periods for anyone who has completed their minimum contract term.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)