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Mobile phone playing SIS's game signature
Games generally do not need to be signed, and software needs to be signed.

You arranged it.

Operating Steps: In the menu key-Application-Program Management-Options-Settings, select "All" for software installation and "Close" for online certificate inspection).

How to solve the problem of certificate error during installation?

A: In order to successfully install all the software applicable to S60 3rd edition models, you need to select "Register programs only/all" in Tools-Program Management and "Software Installation" in Options = = = Settings. It is recommended to select "All" for online certificate inspection: you can select "Must Pass Inspection/Open".

Why can't I install any software and always prompt "Installation security error, can't install!"

Answer: Please follow the steps: Tools-Program Management-Options-Settings-Install Software: All.