Thanks for your comment wizard_hu_ and thanks for moving the parts to appropriate boards.

I picked this thread by random Googling, I think :)
I just wanted to share the knowledge about how to...

Here's how I got the error "Installation security error. Unable to Install." and solved it...

I tell the full story what I was trying to do...
I was copying contacts from Nokia 6680 to N8. ...

All beginner 3rd Edition developers, please note that
the "Self Signed Certificate" is a very easy option for getting
your simple 3rd Edition applications signed & installed to the phone!
...

I have the same problem. This post probably does not help anyone, but at least the problem seems to be common.

Hi,
I heard that Symbian phones with Service Pack 2 have pre-installed SIP stacks.
I'm developing a SIP application on 6680.
So I tried to run the ChipFlip example on a 6680. However, I couldn't...