WML 1.1 and XHTML
 

I would like to know how to force WML 1.1 for all the new devices. We have
1.1 framework with DU4.0. Most of the new devices shows blank white page when
we render the aspx page content. It works fine only after we filter the same
I would like to know without any custom filters, how can we force WML 1.1 on
all new devices.

Also the steps which are required to do for enabling XHTML on ASPX panel.