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-7-sml

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.
android-8-sml

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

3. Enable permission and install the app.