Key_Master - 11:41 am on Jun 4, 2013 (gmt 0)
You should be particularly wary of any UNTRUSTED Nokia agent coming from cell phone proxies in India, China, or the Middle East. The Iranians always use this agent to hand check sites in their system. It means your site has been targeted for malicious activity. Most likely from operations in Europe.
Block UNTRUSTED and they'll be forced to proxy in through opera-mini. Then you can catch them red handed using X-Forwarded.