From a temporary webpage at http://lessonslearned.org/sniff
"We are seeing clear evidence across the country of both consumer and
enterprise devices having network traffic altered through these tracking
beacon headers.
Most importantly, when present, AT&T and Verizon tracking beacons persist
even after changing locations or IP addresses, and do so in spite of any
browser privacy settings."
In response to many questions about the best defense you can take (short of
changing providers), my advice is to use HTTPS wherever possible, or (better)
use a VPN service, or possibly a proxy service. Unfortunately, no browser
plug-in is going to be 100% effective unless you strictly visit HTTPS sites
or trust the plug-in proxy provider. In the case of HTTPS, a VPN or proxy,
the HTTP network headers cannot be modified/injected by your cellular ISP."
--
Another article is here: http://www.wired.com/2014/10/verizons-perma-cookie/
and here
http://www.forbes.com/sites/kashmirhill/2014/10/28/att-says-its-testing-unkillable-tracker-on-customers-smartphones/
