It's not related to Guix, but places like retail shops, banks, etc host phone location tracking equipment that is used to target advertising.
On Mon, Mar 30, 2020 at 11:33:10AM +0000, zna...@disroot.org wrote: > Hello, dear Guix hackers! I want to understand how they could get my phone > number. > > Last week I've visited a bank and spent there an hour waiting they make a > payment to custom. > I had Redmi Mi 9T smartphone in my hands, Android 10 QKQ 1.190825.002, > MIUI Global 11.0.4 Stable 11.0.4.0 (QFJMIXM) > > Waiting in the bank, I uploaded one video on YouTube channel on which > my phone is in the contacts. > 4g connection was so slow that I spent time waiting percent by percent of > uploading. > > I use mobile operator Beeline. In Russia I have no any operator I can believe, > but this is less problematic from all, cause its managers are not oligarchs. > > After two hours I came back home I received two calls from different > money credit companies > (just like "fast money", "take money and go away that way") > and one SMS from another company. > > And the next day three calls more and two SMS with offers of money credit. > > Those were robots autocallers. > > I'd never used that phone number where I've got calls, and never took credits, > never gave that my phone number anywhere > (cause I usually use another phone number). > > This case shows not free software and not free hardware adds bothers. > > This may be so: > > 1) They can track phones with Geo data (but I have switched off Geo location) > 2) They may invade bank workers phones with viruses that > connect with clients phones, get clients phone numbers and send this info. > 3) They may track mobile operator data (4g) from antennas > 4) Also the same mobile operator may sell info which client locate near that > antenna near the bank > 5) May be some of my applications does track me. > > How do you think? > > Do you use Telegram, Whatsapp? > > Is it comfortable to use jami, tox chat?
