I modified my .htaccess file in my domain’s root directory with the code above.

I added a .htaccess file in the subdomain folder (mydomain.com/mobile)
with one line.

RewriteEngine off

That fixed the redirect loop for me.

RewriteEngine on
RewriteCond %{HTTP_USER_AGENT} iPhone
RewriteCond %{REQUEST_URI} !^/iphone/
RewriteRule .* /iphone/ [R]

I see the issue with the redirect loop. The page I am trying to forward to is using the same htaccess.

What is the condition syntax to “add a condition at the top of your htaccess.”

Thanks.
Here is the redirect:

#redirect mobile browsers
RewriteCond %{HTTP_USER_AGENT} ^.*iPhone.*$
RewriteRule ^(.*)$ http://www.davidgregorywells.com/social [R=301]
RewriteCond %{HTTP_USER_AGENT} ^.*iPad.*$
RewriteRule ^(.*)$ http://www.davidgregorywells.com/social [R=301]
RewriteCond %{HTTP_USER_AGENT} ^.*BlackBerry.*$
RewriteRule ^(.*)$ http://www.davidgregorywells.com/social [R=301]
RewriteCond %{HTTP_USER_AGENT} ^.*Palm.*$
RewriteRule ^(.*)$ http://www.davidgregorywells.com/social [R=301]

If you have a too many redirections that means you try to redirect the user to the same domain with the same htaccess and here the loop!

The solution is too redirect the user to anohter domain with no htaccess or to redirect the user to an mobile.html page and to add a condition at the top of your htaccess.

I cannot post the complete code due to my company … but the idea is here