Ensure that your phone and browser have the permission to download and install apps from "Unknown sources" or "Unknown apps". For this, you might need to:
1. Go into phone settings, and into your apps to find the browser app you're using
2. Search within app permissions or the advanced settings section
3. Allow installation
*Please be aware that the screenshots provided below serve as general guides only. There can be slight differences in the settings and permission options across various smartphone brands and models.
