PaulG wrote:
So is it not possible to have iphones and others types of OS use the same m.subdomain?
No, in current version it's impossible. The problem is that "subdomains" in MobileJoomla are used both to redirect and to determine type of device. Maybe it will be improved in further releases.
But there is a workaround. It requires m.subdomain to be independent site on the same server (instead of just an alias) that is a full copy of main site. In this case you will use the same database (that is both sites will be identical), but will be able to modify MJ settings independently (and disable to use subdomains on m.subdomain).