Hopefully someone here who uses a mobile can help.
I tend to like the full versions of most sites on my mobile but most like an effective and fast mobile version better on their phone.
When I first opened this forum on my phone (before I went live) it had a very generic looking page on black and white. I think at that point I was given an option to have the full site which I selected.
Forum host just replied with the following:
It auto detects popular devices like iphone, ipad, android and switches.
Otherwise click mobile link in the footer of your of forum.