the mobile phone can sign itself by downloading a self-signed tool, and it only takes 3 seconds to successfully sign the visa and install it. The mobile phone logs in to wap point s6sign point C, Oh, M, because the URL will be blocked in the answer, so I use Chinese to separate it. Please forgive me, the address is not a virus website, but it is formal. Choose a good model, download and install it, by the way. Settings in the mobile phone-application-program management-software installation (changed to: all)-online certificate inspection (changed to: off), so as to install this self-signing tool. After installation, open the software and select one of Monternet and mobile MMS as the access point. Find the file to be installed. If your software is downloaded by uc, you can look for the software in the ucdownload on disk E, and then choose to install and sign it, so that the installation is successful. This way, the mobile phone system can be prevented from being destroyed. I'm glad to answer your questions.