$ sudo apt-get update
$ sudo apt-get install libmodemmanagerqt-dbg 

libmodemmanagerqt-dbg is installed in your system.

Make ensure the libmodemmanagerqt-dbg package were installed using the commands given below,

$ sudo dpkg-query -l | grep libmodemmanagerqt-dbg *

You will get with libmodemmanagerqt-dbg package name, version, architecture and description in a table

libmodemmanagerqt-dbg package basic information: