Error message 1: Certificate expired

Problem description: The software certificate has expired.

Solution: 1: Adjust the phone time to within the certificate period (change Set the phone time forward a few months) before installation, and set it back to the correct time after installation

(How to adjust the time: Settings--Mobile settings--General--Date and time--Date)< /p>

　2: Re-sign the software

Error message two: Certificate error

Problem description: 1. The installed software is not signed 2. If it is a JAR program, generally It's because there is a certificate conflict. (Many Java games will issue this error message, see the solution below 2)

Solution: 1: Sign the software;

2: Install the program (software/game) directly Go to the phone or change the memory card

Error message three: Update error

Problem description: This prompt usually occurs because there is an old version of the same software in the phone that has not been deleted when installing software. Repeated installation was performed. Or conflicts may occur due to different titles of the new and old software installers.

Solution: 1: Uninstall the old version of the software, and then install the new version of the software;

2: Unpack the new version of the software, and change the installation program title in the PKG document to Consistent with the old version

Error message 4: The certificate has not yet taken effect

Problem description: The time of the mobile phone exceeds the period of the software certificate.

Solution: 1: Check whether the date of the mobile phone is set correctly;

2: Adjust the mobile phone time to within the period of the certificate, and then install it again. Just adjust the time back to the correct time after installation

Error message five: The required program access permissions are not granted

Problem description: 1. Based on the third version of Symbian system Due to security issues, the permissions of some programs are prohibited. No program can be installed without this permission, or the program has been signed. 2. Certificate error.

Solution: 1: Use unsigned software to re-sign it and then install it;

2: Remove the mobile phone certificate permission restrictions----XX mobile phone

Problem description: 1: Caused by software signature error or the software has been signed multiple times. 2: A low-privilege certificate signed a high-privilege program

Solution: 1: Use unsigned software to re-sign it and then install it.

2: Verify the certificate permissions required by the program. The certificate permissions must match the program permissions. (Currently, the certificate produced by this forum has 17 permissions. This problem may occur when signing a program with 19 permissions)

Error message seven: Unable to install protected applications provided by untrusted providers.

Problem description: There are several possibilities that may cause this problem: 1. Mobile phone settings problem 2. The software is not signed or the signature is incorrect 3. Certificate conflict.

Solution: 1: Enter the "Program Management" - "Options" - "Settings" of the mobile phone: set "Install Software" to -- All, and set "Online Certificate Check" to -- Off; < /p>

2: Re-sign the unsigned software before installing it;

3: Install it after formatting the machine (please make a backup before formatting the machine)

Problem description: The installation program file is damaged or incomplete. It may be caused by file damage when downloading or uninstalling the program.

Solution: Please make sure the downloaded program file is good. It is recommended to download again (download from other posts) or decompress the program and try again.

Error message 9: No prompts

Problem description: After the program is installed, it cannot be run when you click its icon. This usually occurs with JAR programs with Chinese file names.

Solution: Delete the installed JAR program, change the JAR program file name to all English and try again.

Error message 10: The phone failed to start up

Problem description: This problem usually occurs when restarting the phone after a certain program fails to be installed. Part of it is caused by the failure to upgrade the machine.

Solution: If a certain program fails to install, just take out the memory card and start the machine again. And delete the incorrectly installed program. If it occurs after the phone is upgraded, then the only option is to reset the phone. It should be noted that some software that starts at startup and resides in the memory cannot be solved by formatting. Therefore, you need to close or delete all these software before soft formatting.

Error message 11: This application is for development purposes only. Continued installation may cause serious problems with your device

Problem description: This is the software's disclaimer.

Solution: Ignore it and continue the installation!

Error message 12: The certificate validity cannot be checked online, please check the settings

Problem description: Mobile phone settings problem

Solution: Settings--Mobile phone settings --Applications--Program Management: "Software Installation"--select "All", "Online Certificate Check"--select "Off".