Is there any way to block headers from a cell phone? I mean this:

"Mozilla/5.0 (Linux; Android 5.1.1; [b]Lenovo A6020a40[/b] Build/LMY47V) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.83 Mobile Safari/537.36"

I want to block people who are trying to get into this mobile device model. How can it be?