on 08-06-2021 15:32
Fill out the form here https://www.o2.co.uk/help/device-and-sim-support/how-to-keep-your-mobile-number
or call customer service http://www.o2.co.uk/contactus
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 08-06-2021 15:34
@Anonymous18 Call customer service.
Call 202 from your mobile or 0800 032 1402
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Best time to call is 8 am.