For whatever it’s worth, the built-in web browser in my Nokia E61 uses this user-agent string:

Mozilla/5.0 (SymbianOS/9.1; U; en-us) AppleWebKit/413 (KHTML, like Gecko) Safari/413 UP.Link/

I knew that the browser is derived from Apple’s open-source webkit tree, but I didn’t expect it to call itself Safari in the user-agent header.

For what it’s worth, here’s the most recent Safari build that I’ve seen in my logs:

Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/418 (KHTML, like Gecko) Safari/417.9.3

Given the version numbers, it doesn’t look like Nokia’s lagging very far behind Apple right now.