Checking good old webmaster tools.
I was intrigued to find that I had over 500 Not Found Errors under the Smart phone section.
So after i examined the details i found the following.
That xxxxxx/m/xxxxxxx.html
and xxxxxx/mobile/xxxx.html
Were links not found, it will make more sense if your see this article.
Click Me Web Master tools help I dont have any /m/ or /mobile/ links so they are "Faulty Redirects"
Google say its nothing to be over concerned with but something else to keep in the mix.