Solutions to ten program installation error prompts:

Error prompt one: Update error★Problem description: This prompt usually occurs because there is an old version of the same program in the phone when installing software The software was not deleted and reinstalled. Or conflicts may occur due to different titles of the new and old software installers. ★Solution: Type 1: Uninstall the old version of the software and then install the new version of the software. Type 2: Unpack the new version of the software and change the installer title in the PKG document to be consistent with the old version.

Error message 2: Certificate error★ Problem description: 1. The installed software is not signed 2. If it is a JAR program, it is usually because the certificate conflicts. (Many java games will issue this error message. See item 2 below for the solution.) ★Solution: Type 1: Sign the software. Type 2: Install the program (software/game) directly onto the phone.

Error message three: Certificate expired Problem description: The software certificate has expired. ★Solution: Type 1: Adjust the phone time to within the certificate period, and then install it. Just adjust it back to the correct time after installation. Type 2: Re-sign the software.

Error message four: The certificate is not yet valid★ Problem description: The time of the mobile phone exceeds the period of the software certificate. ★Solution: Adjust the phone time to within the certificate period, and then install it again. Just adjust it back to the correct time after installation.

Error message five: The required program access permissions are not granted★Problem description: 1. Due to the security issues of the Symbian version 3 system, the permissions of some programs are prohibited. No program can be installed without this permission. 2. Certificate error. ★Solution: Type 1: Remove the prohibited permissions of the program (i.e. crack XX mobile phone). Type 2: Use unsigned software to re-sign it and then install it.

Error message six: The certificate is restricted★Problem description: Generally caused by software signature errors or software that has been signed multiple times. ★Solution: Use unsigned software to re-sign it and then install it.

Error message seven: Unable to install protected applications provided by untrusted providers★Problem description: There are several possible causes of this problem: 1. Mobile phone settings problems. 2. The software is not signed or the signature is incorrect. 3. Certificate conflict. ★Solution: Type 1: Enter the "Program Management" - "Options" - "Settings" of the mobile phone: Set "Install Software" to → All, and set "Online Certificate Check" to → Off! Type 2: Set the unsigned Re-sign the over-named software before installing it. Type 3: Install after gridding. (Note: Please back up your data before formatting.)

Error message eight: File is damaged★ Problem description: The installation program file is damaged or incomplete. It is possible that the file is damaged when the program is downloaded or decompressed. Solution: Please make sure the downloaded program file is good. It is recommended to download or decompress the program again and try again.

Error message nine: No prompts, no response when running★Problem description: This situation 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, please contact the retailer★Problem description: This prompt usually appears when restarting the phone after a program fails to be installed, and sometimes it is caused by a 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.