Downloading… Android will not tell you when it finishes, and the progress bar sometimes
stops short even though the file arrived.
- Open Files → Downloads and tap the .apk.
- Android may ask permission to install — say yes.
- If the tap does nothing at all, there is no prompt to say yes to. Go to
Settings → Apps → Special app access → Install unknown apps, pick your browser,
and turn on Allow from this source.
