This can than be used to track their precise location.
The researchers assembled a $1,400 gadget which runs on freely available open-source software.
The researchers said only tech savvy smartphone users can detect any intrusion made by their gadget.
Anybody with a Facebook account can send another user a Facebook message.
Also read:How To Hack WhatsApp Using SS7 Flaw
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source: www.techworm.net
