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I just checked my AT&T phone and I have an X-Acr header too.


Same, I've opted out here and I still get it:

http://www.att.com/gen/privacy-policy?pid=24339


Just checked my phone and I have "do not track" turned on and x-acr is tracking. Who/what is it? Why? How do I stop it?


Checked over data not WiFi


How're you checking?


Go to this page over a cellular connection. (Turn off your wifi) http://checkyourinfo.com/request Then look for a long number.




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