> having a person phone number can lead to eventually identify that person while that internal trace id it might use, won't.

What? Many many bad people seem to somehow have my number. Practically daily I get an SMSs saying "I've been transferred $5000 to the please login to confirm your transaction .." or some such. I block but they keep on coming. Now, I think I'd rather the person who was responsible for these SMSs to have my phone number than a freaking app running on my phone, especially an app that was basically snuck on without consent.