title: How accurate is Google's libphonenumber?
body: <p>I'm wanting to incorporate Google's libphonenumber library into a CRM solution that I'm working on, to identify things such as:</p>
  
  <ul>
  <li>Whether a phone number is mobile or landline</li>
  <li>Geo-location of the number</li>
  </ul>
  
  <p>I've done some searching online, and can't seem to find anything discussing what algorithms the library is using to determine this information, and how reliable those methods are.</p>
  
  <p>Is there any such documentation (ie, details of the these algorithms and their respective reliability)? Or really, anything to help me understand what happens under-the-covers for this library?</p>