Name some useless inventions?

It's not useless though
The case helps protect the floor from the phone

Hat on a hat

That's not true, that case is not to protect the phone, it was made so you can hook it up to your belt, therefore it's easier to carry.

The nokia’s weakness: a scratched screen

My dad had this model and this exact case. I decided it was important enough to tell everyone. I live dangerously.