title: Incompatible operand types?
body: <p>Why would this line of code produce an error saying that <code>PhoneType</code> and <code>String</code> are incompatible operand types?</p>
  
  <pre><code>if(nonKeyLookupDetails.getISDCodePlusPhoneNumber() != null &amp;&amp; nonKeyLookupDetails.getISDCodePlusPhoneNumber() != "%" 
  </code></pre>