Security+Tianyi U Shield is to write the digital certificate of Anhui CA into the mobile phone UIM card or the third-party storage medium (TF) to realize the functions of identity authentication, digital signature, mobile authorization, encrypted storage and so on, and meet the national requirements for domestic cryptographic algorithms. Pay attention to China Telecom's Guizhou customer service and official WeChat account. One-click query recharge, flow, points, bills, detailed bills, convenient and fast.

Customer service 10 1 will answer your questions.