Honestly, I think the current format used by most m.website.tld makes the most sense. It immediately tells you you're going to a mobile site in the case that y

Honestly, I think the current format used by most m.website.tld makes the most sense. It immediately tells you you're going to a mobile site in the case that your screen cuts off the full URL. Too, it's pretty consistent when a lot of sites use subdomains to indicate you're going to a different portion of the same domain, i.e. a blog (blog.site.tld) or an estore (shop.site.tld) or even a 404 page (404.site.tld). 'm' should tell you then that you're on the mobile page of the same site, especially when we're now seeing so many domains that a .com can be a completely different, totally nonaffiliated group from the .net