Thanks to Ogbongeblog, This is a general problem in every blogger.com blog especially those making use of the blogger mobile custom template.

This may seem very annoying to your blog readers when trying to comment on a post clicks on Post a comment from there Mobile phones probably while accessing it with Opera mini. And the page loads without actually producing the comment box.

The perfect fix/solution to this is by adding the below CSS code to you blogger blog’s html. This will make comment box appear under every post without having the need to click to reveal.

.blogger-iframe-colorize {
display: block !important;
}

To Add The CSS Code To Your Blog
==>Sign in to www.blogger.com
==>Select blog to which you want to apply code to
==>Back up your current template.
==>Click “Template” => “Edit HTML
==>Click inside the HTML box
==>Now use **CTRL F** to find ]]></b:skin>
==>Paste the above CSS code directly above it as shown in the image below

==>Finally save template. Goto your blog and try commenting with a mobile browser like opera mini.
Works like charm.