Internet rumor: "when the phone runs out of power, just type *3370# on the dial-up keyboard, and when you dial it out, the phone will be rebooted, and when you finish booting, you will find that the power is 50% higher"The author's experiment: in the above i-phone4, samsung S4 and lenovo A288T mobile phones, the author typed *3370# command on the dial-up keyboard respectively, and the mobile phone showed "error occurred while executing the request, unknown error".