First sorry about my English.
Is CA(that can accept install symbian app) on the phone fixed(cannot add/del)? I just trying to import a CA.cer, it just can accept 3 options and no "Symbian Installation" can set Yes.
Can we make a personal-CA(that can accept symbian installation)and then import my phone, make a CSR by DevRequestTool and sign the csr by personal-CA, so that we can use the .cer to sign our app and install on phone. Is it possible?