ALEXANDRIA, Va., May 26 -- United States Patent no. 12,639,408, issued on May 26, was assigned to Huawei Technologies Co. Ltd. (Shenzhen, China).
"Personal identification number pin processing method and apparatus" was invented by Yuanfeng Li (Shenzhen, China), Fengguang Qiu (Shenzhen, China) and Shaojun Wang (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "In accordance with an embodiment, a method for verifying a personal identification number (PIN) code includes: receiving a first PIN code entered by the user, and storing the first PIN code to complete enabling the function of automatically verifying the PIN code of a first subscriber identity module (SIM) card, wherein the first PIN code is used ...