Does O2 share my phone number to 3rd party?

[Anonymous]

Today someone called  me on my "additional" number and ask about a specific person (name).

He knows what my full name is, and no one has this number except O2 and my family. So how is it possible? 

If O2 shared my data to the 3rd party companies I should know about it! This is my privacy! 

How can I block sharing my data in the future?

[pdfbt40]

Fine if you can actually access "My Contact Preferences". Customer Services say there's a problem downloading from the server as I sit watching the timer widget for tens of minutes.

[MI5]

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@Anonymous wrote:

I recorded my desktop and browser when I disabled this option
so I'm going to be rich when return to enable again 🤣😂🤑🤑

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Good luck with that, we all tried

[Cleoriff]

O2 made changes to the functionality of MY O2. By doing so they conveniently changed the default settings for everyone. We noticed pretty quickly and changed back.....The damage was probably done by then

[MI5]

Mine have only just stopped but that's prob 'cause I've blocked all the spam numbers.
It was back in June 16 this all kicked off the first time so that's 12 months of harassment o2 have put me through........

[pdfbt40]

There is of course texting/calling 2220, depending who is helping you.
Unforunately texting STOP doesn't seem to achieve anything.
Calling them is more encouraging. A promising introductory message about all the annoying notifications, always followed by a message "We're very busy at the moment, Wait an hour and call back" !!!!

[MI5]

They don't want you to change it!