Since June last year, symbian signed website, which manages Symbian certificates abroad, has changed its certificate-related policies, which makes it impossible to make new certificates. Therefore, all domestic mobile phone certification forums have stopped making certificates, and it is estimated that they will not be opened in the future.

Current solution:

1. For the software with low permission requirements, you can try to use Symbian direct signing tool mobile version v 1.2 1 to sign, but it is not guaranteed to be effective, so you can only say that you can try.

2. Of course, you can also crack the mobile phone. After the phone is cracked, no certificate signature is required to install any software.

However, there is a program that needs to be signed during the cracking process, so it may need the signature of the above direct signing tool.