I have enabled spend cap at £0 / month extra (it shows as a bolt-on on my O2 account), but I can still make international calls.
I just let it ring and hang up to try - I don't want to actually call somebody and they pick up to find out that O2 cap doesn't work.
So what would happen? The call would be answered and then dropped and I would be charged £1?
Is there a call barring code (international calls) that I can use to bar international calls or I have to call customer services?
I have a 3 connection as well and I can enable spend cap online and I have the barring code (0000) to enable call bars. Why doesn't O2 follow standard practices? Call barring was introduced in 1992 with GSM...
I doubt anyone here will know what would happen. To my mind you shouldn't be able to make a chargeable call at all.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.