title: Is there a way for PWAs to access the phone number of the host device?
body: <p>I plan on developing a Progressive Web App for Android devices - one major concern is if the PWA can <em>access the host phone number</em>. Our business is providing cheap mobile phones to our business partners and if our PWA can access the phone numbers of the devices, we can do easier 2-factor authentication.</p>
  
  <p>I figure the way a PWA can access the host phone number - is when the user launches the app from their mobile phone's Home Screen.</p>
  
  <p>Is this possible somehow?
  This great answer from Dan doesn't cover this question unfortunately:
  <a href="https://stackoverflow.com/questions/35504194/what-features-do-progressive-web-apps-have-vs-native-apps-and-vice-versa-on-an">What features do Progressive Web Apps have vs. native apps and vice-versa, on Android</a></p>