HTML5/Bootstrap - How do i add tooltip for bootstrap glyphicon icons? : <p>How do i add the tooltip for the below HTML5 statement?</p>

<pre><code>&lt;tr&gt;&lt;td&gt;&lt;a ng-href="#"&gt;Call us&lt;/a&gt;
&lt;span class="glyphicon glyphicon-phone" &gt; &lt;/span&gt;

&lt;/td&gt;
</code></pre>
