O2 Accused Of Sharing Customer Cellphone Number Over HTTP Header Traffic

Posted on Jan 25 2012 - 11:41am by Editorial Staff

O2, British Telecommunication provider, accused of sharing customer phone numbers with every visited website. O2 appears to be sending customer’s numbers in HTTP header traffic.

Twitter user @lewispeckover picked up the problem and created a simple website to show what’s happening. The site returns the information any website could poll from a user. The site clearly shows the the x-up-calling-line-id header is in full force when accessing the site via a mobile phone, but in actual O2 is sending out the information.

The company says it is “investigating this at the moment and will update everyone as soon as [it] can,” but customers on twitter have reacted with anger.  Commenter’s pointed out the O2’s MVNO – GiffGaff and Tesco Mobile both get affected by the phone number sharing problem too.

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