title: Android apk Installation failed. Installation package error, unable to install
body: <p>I am developing an app, if I run from android studio in to my device, it is running absolutely fine. If I put my apk into google drive and share with others, it is showing error <code>("Android apk Installation failed. Installation package error, unable to install.")</code> when they try to install the app. It's not a signed apk. It's still in prototype phase (debug mode).</p>
  
  <p>Please let me know where I am doing wrong.</p>