Comment by andix
> You clearly aren’t familiar with how broad the Computer Misuse Act is
No, I'm not familiar with it at all. But usually illegal hacking requires to access devices in a way you aren't allowed to access. As long as making the phone call itself is not an issue, it should be fine. Dumping data from the memory of your phone can't be unauthorized.
It would probably become an issue if you make unusual phone calls, harassing people with constantly calling, or calling just for the purpose of getting the location data and immediately hanging up. But just dumping the diagnostics for regular phone calls should be fine (I'm not a lawyer).
> Dumping data from the memory of your phone can't be unauthorized.
> just dumping the diagnostics for regular phone calls should be fine
IANAL, but computer hacking laws like the CMA in the UK and CFAA in the US are written in a manner so vague that even pressing F12 to view the source of a web page could be a violation [0]. From O2's perspective, they could argue that the OP has accessed their internal diagnostic data in an unauthorized manner. What we (technical people) think is irrelevant.
[0]: In the US, the DOJ has revised its policy to not prosecute defendants pursuing "good faith security research," which you may trust at your own risk: https://www.justice.gov/archives/opa/pr/department-justice-a...