"Zombie cookies rise again as telcos respond to our report on tracking headers", 9 Oct 2015

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We have fought to expose the use of mobile tracking headers, and made some progress in holding companies to account. We built a tool at Amibeingtracked.com that allowed mobile device users to test whether they were being tracked, and nearly 200,000 people took our test over a six month period. In our report, released in August, we found around 15% of the tests showed evidence of tracking headers in 10 countries around the globe.

The nonprofit Business and Human Rights Resource Centre invited formal responses from the companies named in our report. As shown on their website, we have now received responses from five of the telcos: AT&T, Cricket, Telefónica, Verizon, and Vodafone. A sixth, Indian firm Bharti Airtel, responded to media and reached out with questions to Access, but never followed up or responded to us directly.

Let’s go through the responses, one by one...