Only limited operation available for Samsung S4 LTE (GT-I9505). Can copy files from device but not open files directly on device. Gives “Failed to open input stream” (example of the messages) type of error.
from Comment by Tapio Valli — February 3, 2014
sudo add-apt-repository ppa:langdalepl/gvfs-mtp
sudo apt-get update
sudo apt-get upgrade