But I am a curious person. I want to know who or what company called me.
Some Caller ID apps force the user to upload their entire contact list. I am not interested in those. I consider that a breach of my privacy. Maybe that is their true monetization method? Reselling contact lists?
https://www.t-mobile.com/support/plans-features/self-service...
I don't think they're doing this because they just upload your contact list to their database so the "caller ID" feature works better. It wouldn't make sense for them to sell their database because then they might end up helping a competitor.
Of course that doesn't make these practices right
The T-Mobile “Scam Shield” feature is also nice (free on some plans). I send those calls straight to voicemail.
Their phone databases get filled with your contact list, that's how they get to be accurate and up-to-date.