14-12-2019 10:25 - edited 14-12-2019 10:27
on 14-12-2019 11:10
The only way on PAYG is to call customer service but you'd have to do this everytime you wanted the information.
There is no records available for you to view except on your own phone.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 14-12-2019 20:32
If you have balance notifications turned on you can see how much you are paying after every text or call. Otherwise you can see the charges er minute and per text in My O2.