The magazine cited internal documents from the NSA and its British counterpart GCHQ in which the agencies describe setting up dedicated teams for each type of phone as part of their effort to gather intelligence on potential threats such as terrorists.
The data obtained this way includes contacts, call lists, SMS traffic, notes and location information, Der Spiegel reported. The documents don't indicate that the NSA is conducting mass surveillance of phone users but rather that these techniques are used to eavesdrop on specific individuals, the magazine said.
The article doesn't explain how the magazine obtained the documents, which are described as "secret." But one of its authors is Laura Poitras, an American filmmaker with close contacts to NSA leaker Edward Snowden who has published several articles about the NSA in Der Spiegel in recent weeks.
