Recently another “adjustable” SMS from an unknown number came: “I don’t have money, call me back immediately or put 40 rubles. about me. ” Naturally, I didn’t do anything, but an idea arose: the mobile operator may issue a voice alert when calling to such a paid number. For example, “Attention, the cost of connection to the dialed number will be xxx rubles, and the cost of the call yyy rubles per minute”. And then 3 seconds to clear the call. I think almost everyone, having heard such a warning, will understand that a SMS with a request to call back was a pure divorce and will have time to save their money.