1. Enable installing "unknown apps" option on your phone

Android 7 (Nougat)

  1. Go into Settings.
  2. Tap Security (or Lock Screen and Security).
  3. Scroll down to the Device Administration section, and enable Unknown Sources.

Android 8 (Oreo) and Android 9 (Pie)

  1. Go to Settings.
  2. Tap Apps and Notifications.
  3. Tap on the 3-dots icon located at the top right of the screen.
  4. Select Special access.
  5. Tap on install unknown apps.
  6. Enable the permission for UNiRIDE app to install.

2. Locate the apk using your phone's "File Manager".

3. Enable permission and install the app.