huawei g525 / c8813q

ls -alrth /dev/socket/rild*
srw-rw---- 1 radio system 0 Dec 27 12:10 /dev/socket/rild-debug
srw-rw---- 1 root  radio  0 Dec 27 12:10 /dev/socket/rild
srw-rw---- 1 root  radio  0 Dec 27 12:10 /dev/socket/rild1
srw-rw---- 1 radio system 0 Dec 27 12:10 /dev/socket/rild-debug1