The UC signature version is downloaded directly from WAP Baidu on the mobile phone, which is less than 400KB. Only in this way can it be convenient to use signed JAVA software. Signature JAD under PC may not be available.

Please ensure that your mobile phone certificate is complete (see Security Settings-User Certificates-Certificate List). At least 15)

Otherwise, you can't use software that signs JAVA. Now many Nokia s40 phones are incomplete.

You will be prompted that the mobile phone or SIM card has no certificate.

If it is not enough, you have to import a certificate. There are tutorials online.

In fact, you can directly use a subsidiary function of Phoenix Brush software to directly remove the permissions, so that you are not afraid of annoying permission prompts!

You can go to the mobile bus forum to see if you hope to pass.