on 01-11-2019 10:31
Call them on 202, but we have been told they are having issues today so you might need to be patient.
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
on 01-11-2019 10:34
Alternatively you can buy more data as a bolt on or use WiFi wherever possible.
on 01-11-2019 11:54
Login to your MyO2 and change your tariff yourself.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)