diff --git a/info/lsusb-ls996.txt b/info/lsusb-ls996.txt
new file mode 100644
index 0000000..8dd42c7
--- /dev/null
+++ b/info/lsusb-ls996.txt
@@ -0,0 +1,139 @@
+Bus 001 Device 006: ID 1004:633a LG Electronics, Inc. 
+Device Descriptor:
+  bLength                18
+  bDescriptorType         1
+  bcdUSB               2.10
+  bDeviceClass          239 Miscellaneous Device
+  bDeviceSubClass         2 ?
+  bDeviceProtocol         1 Interface Association
+  bMaxPacketSize0        64
+  idVendor           0x1004 LG Electronics, Inc.
+  idProduct          0x633a 
+  bcdDevice            3.10
+  iManufacturer           1 LG Electronics Inc.
+  iProduct                2 LGE Android Phone
+  iSerial                 3 LGLS996xxxxxxxx
+  bNumConfigurations      1
+  Configuration Descriptor:
+    bLength                 9
+    bDescriptorType         2
+    wTotalLength           98
+    bNumInterfaces          3
+    bConfigurationValue     1
+    iConfiguration          0 
+    bmAttributes         0x80
+      (Bus Powered)
+    MaxPower              500mA
+    Interface Association:
+      bLength                 8
+      bDescriptorType        11
+      bFirstInterface         0
+      bInterfaceCount         2
+      bFunctionClass          2 Communications
+      bFunctionSubClass       2 Abstract (modem)
+      bFunctionProtocol       1 AT-commands (v.25ter)
+      iFunction               7 CDC Serial
+    Interface Descriptor:
+      bLength                 9
+      bDescriptorType         4
+      bInterfaceNumber        0
+      bAlternateSetting       0
+      bNumEndpoints           1
+      bInterfaceClass         2 Communications
+      bInterfaceSubClass      2 Abstract (modem)
+      bInterfaceProtocol      1 AT-commands (v.25ter)
+      iInterface              5 CDC Abstract Control Model (ACM)
+      CDC Header:
+        bcdCDC               1.10
+      CDC Call Management:
+        bmCapabilities       0x00
+        bDataInterface          1
+      CDC ACM:
+        bmCapabilities       0x02
+          line coding and serial state
+      CDC Union:
+        bMasterInterface        0
+        bSlaveInterface         1 
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x82  EP 2 IN
+        bmAttributes            3
+          Transfer Type            Interrupt
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0040  1x 64 bytes
+        bInterval               9
+    Interface Descriptor:
+      bLength                 9
+      bDescriptorType         4
+      bInterfaceNumber        1
+      bAlternateSetting       0
+      bNumEndpoints           2
+      bInterfaceClass        10 CDC Data
+      bInterfaceSubClass      0 Unused
+      bInterfaceProtocol      0 
+      iInterface              6 CDC ACM Data
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x81  EP 1 IN
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0200  1x 512 bytes
+        bInterval               0
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x01  EP 1 OUT
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0200  1x 512 bytes
+        bInterval               0
+    Interface Descriptor:
+      bLength                 9
+      bDescriptorType         4
+      bInterfaceNumber        2
+      bAlternateSetting       0
+      bNumEndpoints           2
+      bInterfaceClass       255 Vendor Specific Class
+      bInterfaceSubClass    255 Vendor Specific Subclass
+      bInterfaceProtocol      0 
+      iInterface              0 
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x83  EP 3 IN
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0200  1x 512 bytes
+        bInterval               0
+      Endpoint Descriptor:
+        bLength                 7
+        bDescriptorType         5
+        bEndpointAddress     0x02  EP 2 OUT
+        bmAttributes            2
+          Transfer Type            Bulk
+          Synch Type               None
+          Usage Type               Data
+        wMaxPacketSize     0x0200  1x 512 bytes
+        bInterval               0
+Binary Object Store Descriptor:
+  bLength                 5
+  bDescriptorType        15
+  wTotalLength           12
+  bNumDeviceCaps          1
+  USB 2.0 Extension Device Capability:
+    bLength                 7
+    bDescriptorType        16
+    bDevCapabilityType      2
+    bmAttributes   0x00000000
+      (Missing must-be-set LPM bit!)
+Device Status:     0x0000
+  (Bus Powered)
diff --git a/lglaf.py b/lglaf.py
index 0398dd4..7ea05ae 100755
--- a/lglaf.py
+++ b/lglaf.py
@@ -300,7 +300,7 @@ class USBCommunication(Communication):
     def _match_interface(self, intf):
         return intf.bInterfaceClass == 255 and \
             intf.bInterfaceSubClass == 255 and \
-            intf.bInterfaceProtocol == 255 and \
+            intf.bInterfaceProtocol in (0, 255) and \
             intf.bNumEndpoints == 2 and all(
             usb.util.endpoint_type(ep.bmAttributes) ==
                 usb.util.ENDPOINT_TYPE_BULK