Title is overhyped.
"just by knowing your victim's mobile number"
should read:
"just by knowing your victim's mobile number AND having victim stupid enough to send YOU verification code"
"just by knowing your victim's mobile number"
should read:
"just by knowing your victim's mobile number AND having victim stupid enough to send YOU verification code"
"just by knowing your victim's mobile number AND e-mail address AND having victim stupid enough to send YOU verification code"