The software that uses the Symbian s60 3rd operating system must be digitally signed before it can be used. Although this provides high security, it brings inconvenience to users. The most troublesome thing is that software that requires more API capabilities requires a developer certificate to work. In China, this is called "Self-signed", which is actually a test by developers. ProgramAnd self-signed.
Unfortunately, the developer Certificate Application on the symbiansigned website was unavailable the day before I bought my mobile phone. The reason is obvious: many silly signature software have caused a lot of registration and authentication, causing unnecessary website expenses. Then there is a long wait. 20 days later, symbiansigned finally reopened. Today, it finally opened a developer application for all registered users.
After activating the service, you can use the A4 input method. There are also some software that requires self-signature ~~~ Ah, it's still 3rd. It's not easy to love you ~
