Mobile redirect with forced SSL

You could add a check for the application set cookie at the top of the iRule using something like this:

when HTTP_REQUEST {
    Check if the full site cookie preference has already been set
   if {[HTTP::cookie value "full_site_cookie"] eq "some_value"}{

       Exit this event in this iRule to avoid a possible redirect to the mobile site
      return
   }
    ... rest of the iRule logic to check for mobile user-agents
    and redirect them to the mobile site
}

The cookie could also be set by an iRule on the mobile site assuming you can detect when a user has selected a preference within the web app to go back to the full site.

Aaron