You could do something like this...
<meta http-equiv="refresh" content="0; URL='http://desktop.com'" />
<meta http-equiv="refresh" content="0; URL='http://mobile.com'" />
then in a styles.css you add something like
I tested this on a live server first before posting it here...
This will easily pick one or the other.. But u can modify this to maybe make your homepage a desktop view.. UNLESS they are on mobile - then you show the mobile view.. Instead of redirecting to two different pages..
The reason that I posted my solution with TWO redirects not using the page their actually on .. is I'm assuming your coding is minimal and you may want to redirect to either offer 1/desktop or offer 2 mobile..