diff --git a/userspace/files/78-modem.rules b/userspace/files/78-modem.rules
index b800d80..29d8457 100644
--- a/userspace/files/78-modem.rules
+++ b/userspace/files/78-modem.rules
@@ -1,16 +1,20 @@
-# EG25 GNSS
-KERNEL=="ttyUSB0",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="0125",ENV{ID_MM_DEVICE_IGNORE}="1"
-KERNEL=="ttyUSB2",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="0125",ENV{ID_MM_PORT_IGNORE}="1"
+# EG25
+# Interface 0 - GNSS
+# Interface 2 - AT
+# Interface 3 - AT
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="0125",ENV{ID_USB_INTERFACE_NUM}=="00",ENV{ID_MM_DEVICE_IGNORE}="1"
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="0125",ENV{ID_USB_INTERFACE_NUM}=="02",SYMLINK+="modem_at0",ENV{ID_MM_PORT_IGNORE}="1"
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="0125",ENV{ID_USB_INTERFACE_NUM}=="03",SYMLINK+="modem_at1",ENV{ID_MM_PORT_IGNORE}="1"
 
 # EG91
-# ttyUSB0 - debug
-# ttyUSB1 - GPS
-# ttyUSB2 - AT
-# ttyUSB3 - AT
-KERNEL=="ttyUSB0",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_MM_DEVICE_IGNORE}="1"
-KERNEL=="ttyUSB1",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_MM_DEVICE_IGNORE}="1"
-KERNEL=="ttyUSB2",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_MM_PORT_IGNORE}="1"
-KERNEL=="ttyUSB3",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+# Interface 0 - debug
+# Interface 1 - GPS
+# Interface 2 - AT
+# Interface 3 - AT
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_USB_INTERFACE_NUM}=="00",ENV{ID_MM_DEVICE_IGNORE}="1"
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_USB_INTERFACE_NUM}=="01",ENV{ID_MM_DEVICE_IGNORE}="1"
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_USB_INTERFACE_NUM}=="02",SYMLINK+="modem_at0",ENV{ID_MM_PORT_IGNORE}="1"
+SUBSYSTEM=="tty",ATTRS{idVendor}=="2c7c",ATTRS{idProduct}=="6007",ENV{ID_USB_INTERFACE_NUM}=="03",SYMLINK+="modem_at1",ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
 ACTION=="add",SUBSYSTEM=="usb",ATTR{idVendor}=="2c7c",ATTR{idProduct}=="6007",RUN+="/bin/sh -c 'echo -n $kernel:1.4 > /sys/bus/usb/drivers/cdc_ether/unbind'"
 
 # C16