1. Some software can only be installed after being signed by a certificate. Sogou, 360, Baidu Pinyin and QQ are directly exempt from visas, because Saipan has authorized these softwares. As for the unauthorized software of Saipan, you need to sign it with your own certificate and signature software before you can install it, which has nothing to do with computer download.

2. Mobile phone signature software? Is it free signature, that is, FreeSigner, that is, you can sign with a certificate and key on your mobile phone, that is, mobile phone signing software.

3. If you apply for a new certificate, do you want to start the certificate when installing the software?

The certificate is not used for startup, but for your signature. You need to apply manually, otherwise the application is useless.