There’s no such thing as data privacy. Every single company will sell your data one way or another. Your mobile carrier, Facebook, Google, Apple, Amazon, your favourite local (online or offline) store, even your government !
Almost everything that you use these days needs information about yourself. Location, email, mobile phone number, credit cards, bank accounts, passports, national id documents and so on.
Remember how Pablo Escobar has been caught ? Triangulation, baby !
“…used high-powered antennas to calculate the general direction of his transmission during a phone call with his son. Once this first bearing was charted and visually confirmed, roving pairs of high-tech surveillance vans crisscrossed the streets of Medellín in search of the strongest hits on Escobar’s frequency. When the operators’ equipment calculated the area where all three lines intersected, the race was on to close the distance … where a block search finally yielded Escobar’s precise location.” Wired.com, Sep 2016
This happened almost 30 years ago when military GPS was in “beta version”, when there were no smart devices and no Gigabytes.
Now take all the time you need and think about data privacy in 2019.