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Some robocall blockers sent private data without permission
As helpful as robocall blocking tools can be, they can sometimes create their own problems. NCC Group security researcher Dan Hastings has found that some of the more popular robocall blocking apps have been sending data to outside analytics firms without explicitly notifying you, if at all. Hiya and Truecaller sent device data before you could even accept their privacy policies, while TrapCall sent phone numbers without any mention in the privacy policy. Other apps sent info directly to Facebook the moment they loaded.
