title: Can't install debug version of my android application
body: <p>I wrote an android application in IDEA. When I used Debug-mode (connected to my device) - everything worked nice. But when I manually downloaded apk file to my phone and tried to install application - it said:</p>
  <p>&quot;<strong>Installation failed</strong>. <em>Reason for failture</em>: <strong>This app is for testing only.</strong> <em>Suggestion</em>: <strong>install the official version of this app.</strong>&quot;</p>
  <p>How to solve this problem?</p>
  <p>PS: phone: Huawei p40 lite.</p>