I wonder if the major carriers track and log web browsing history of their own customers as well? And if we can opt out...
T-Mobile, for example even monitors and freaking blocks your usage to certain sites when on airplane mode and on wifi - even when you have wifi assist disabled.
Further, they even deduct from you data usage wifi use!
It's provable! I've proved it and T-Mobile Philippines call center says "oops let me reset your data plan" when called on it.
I proved it by only being in airplane mode and used wifi calling, and seeing that data was being deducted from my account when I wasn't using cell data.
If you have a plan that doesn't offer unlimited calling, calls made over Wi-Fi Calling count against your plan minutes. For Pay In Advance prepaid lines, calls made over Wi-Fi deduct from the plan bucket just like regular calls.
https://tor.stackexchange.com/questions/8/how-does-tor-route...
Verizon has been adding headers for tracking for some time (probably via Blue Coat ProxySG forward proxy or similar technology) https://www.verizonwireless.com/support/unique-identifier-he...