on 04-05-2020 20:06
on 04-05-2020 20:13
on 04-05-2020 20:13
on 04-05-2020 20:26
on 04-05-2020 20:33
on 04-05-2020 20:33
on 04-05-2020 20:59
on 04-05-2020 21:05
on 04-05-2020 21:05
See my answer above
That is how it works
Your wifi goes via the O2 network when you make calls
It's definitely not free which is why you were charged for international calls