I have 26 apps on my phone. Of those, four are Safari extensions, one is a PWA and another I wrote myself. I use a restrictive nextDNS profile that also blocks Apple's native tracking (as best they can) and don't use social media. I feel like that's the best I can realistically do.
And you do realize your cellphone is constantly sharing your location with your cell phone company which is more than willing to give it to the government without a warrant.
Whatever you are doing is meaningless privacy theatre
This makes sense to me but then why is CBP here needing/wanting to pay for ad data if they can just ask the ISPs/cell phone companies?
They are probably actively providing that information. At AT&T we still are working very closely with the NSA.
...and the phone itself broadcasts your position to the cell towers with remarkable accuracy, 24 hours a day.
Hence the "realistically" qualifier.