Secret of the scam of sending gifts for free by SMS

Is a liar, and pretend to be the public security bureau. When I called back, it wasn't the public security bureau, but I found another phone to dial this number. It was the public security bureau, but the public security bureau didn't call and only answered the phone. So don't trust these calls, especially those who guess who I am, who you know, and you won the lottery. Ignore these calls. 1, there will be no pie in the sky; There is something really wrong with the Public Security Bureau. Basically, everyone in that department of this bureau will come directly to the door.