How to show summary in node view?
Solved it by overriding node template for my content type. 

1) Copied node.tpl.php of my theme and renamed it to 
node--content_type.tpl.php.

2) Put the following code at desired place:

&lt;div class="fullmode_summary"&gt;
    &lt;?php if ($view_mode == 'full'): ?&gt;
      &lt;?php print render($node-&gt;body[$node-&gt;language][0]['safe_summary']);  ?&gt;
    &lt;?php endif; ?&gt;
&lt;/div&gt;


May help someone having same issue.