You may be asked for confirmation again, just tap OK. Tap on Settings options and read below.įor Android 6.0 or Older: If you are using Android 6.0 marshmallow or older version of Android, scroll down to find Unknown sources after tapping Settings on the previous step. If this is the first time you are installing an apk file outside of Google Play, then your phone may not allow you to install it and show a warning “Installation Blocked” or a message telling you that you are not allowed to install from this source as shown in the following screenshot. Step 2: When the download completes, tap on Vidmate.apk file you just downloaded.