Source: Natasha Singer - The N.Y. Times ( Paid Registration )

Our mobile carriers know our locations: where our phones travel during working hours and leisure time, where they reside overnight when we sleep. Verizon Wireless even sells demographic profiles of customer groups — including ZIP codes for where they “live, work, shop and more” — to marketers. But when I called my wireless providers, Verizon and T-Mobile, last week in search of data on my comings and goings, call-center agents told me that their companies didn’t share customers’ own location logs with them without a subpoena.

Read Full Article: If my data is an open book, why can’t I read it?