Alt dizindeyse şu kod;

RewriteEngine On
RewriteCond %{REQUEST_URI} !^/mobile.*$
RewriteCond %{HTTP_USER_AGENT} "android|blackberry|ipad|iphone|ipod|iemobile|opera mobile|palmos|webos|googlebot-mobile" [NC]
RewriteRule ^(.*)$ /mobile%{REQUEST_URI} [L,R=302]
Sub domainde ise;

RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} "android|blackberry|ipad|iphone|ipod|iemobile|opera mobile|palmos|webos|googlebot-mobile" [NC]
RewriteRule ^(.*)$ http://m.r10.net%{REQUEST_URI} [L,R=302]
Şu kodu .htaccess dosyanıza ekleyin hocam.