Change from big bundle monthly fee to pay as you go

[Jento]

As I am overseas for a few months, don't want to subscribe to Big Bundle and simply go for Classic Pay As you go. How do I do it? 

[Cleoriff]

@Jento 

You can't. O2 are phasing out Classic unless you are already on that tariff.

[jonsie]

You would be better on a MNO such as Tesco or giffgaff who offer such tariffs.

Guide: How to get your PAC [June 2021 Update] 

Guide: Cancelling Your Contract