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Self-created, Symbian developer certificate, Symbian Signed

What is the difference among a self-created certificate, Symbian Signed and a Symbian developer certificate?

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Since signing is mandatory in S60 3rd Edition, each application should be signed with a certificate to be capable to install the application to a device. When the application doesn’t require any capabilities, this can be signed along with a self-created certificate that can be created with the S60 3rd Edition SDK. If abilities are required, a Symbian developer certificate is needed in the testing and development phase to be capable to test the application on a real device. For last applications, several abilities are granted only by Symbian Signed, therefore the application must be Symbian Signed to gain access to certain abilities. Also, Symbian Signed may be a need for getting the application to or operator sales channels or a manufacturer for example.

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