diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 9ba558406..dbd6cbf31 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -277,9 +277,12 @@ static void option_instat_callback(struct urb *urb);
 #define QUECTEL_PRODUCT_RM500Q			0x0800
 #define QUECTEL_PRODUCT_RM520N			0x0801
 #define QUECTEL_PRODUCT_EC200U			0x0901
+#define QUECTEL_PRODUCT_EC200U_CN		0x0901
 #define QUECTEL_PRODUCT_EG912Y			0x6001
 #define QUECTEL_PRODUCT_EC200S_CN		0x6002
 #define QUECTEL_PRODUCT_EC200A			0x6005
+#define QUECTEL_PRODUCT_EC200A_CN		0x6005
+#define QUECTEL_PRODUCT_EC200N_CN		0x6005
 #define QUECTEL_PRODUCT_EG916Q			0x6007
 #define QUECTEL_PRODUCT_EM061K_LWW		0x6008
 #define QUECTEL_PRODUCT_EM061K_LCN		0x6009
@@ -1277,6 +1280,10 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RG650V, 0xff, 0xff, 0x30) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_RG650V, 0xff, 0, 0) },
 
+	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200U_CN) },
+	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200A_CN) },
+	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC200N_CN) },
+
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) },
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6003),
@@ -2418,6 +2425,7 @@ static struct usb_serial_driver option_1port_device = {
 	.suspend           = usb_wwan_suspend,
 	.resume            = usb_wwan_resume,
 #endif
+	.reset_resume = usb_wwan_resume,
 };
 
 static struct usb_serial_driver * const serial_drivers[] = {
@@ -2460,6 +2468,37 @@ static int option_probe(struct usb_serial *serial,
 	if (device_flags & NUMEP2 && iface_desc->bNumEndpoints != 2)
 		return -ENODEV;
 
+#if 1 //Added by Quectel
+	//Quectel UC20's interface 4 can be used as USB Network device
+	if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6)
+		&& serial->dev->descriptor.idProduct == cpu_to_le16(0x9003)
+		&& serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4)
+		return -ENODEV;
+
+	//Quectel EC20(MDM9215)'s interface 4 can be used as USB Network device
+	if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6)
+		&& serial->dev->descriptor.idProduct == cpu_to_le16(0x9215)
+		&& serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4)
+		return -ENODEV;
+
+	if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C)) {
+		__u16 idProduct = le16_to_cpu(serial->dev->descriptor.idProduct);
+		struct usb_interface_descriptor *intf = &serial->interface->cur_altsetting->desc;
+
+		if (intf->bInterfaceClass != 0xFF || intf->bInterfaceSubClass == 0x42) {
+			//ECM, RNDIS, NCM, MBIM, ACM, UAC, ADB
+			return -ENODEV;
+		}
+
+		if ((idProduct&0xF000) == 0x0000) {
+			//MDM interface 4 is QMI
+			if (intf->bInterfaceNumber == 4 && intf->bNumEndpoints == 3
+			&& intf->bInterfaceSubClass == 0xFF && intf->bInterfaceProtocol == 0xFF)
+			return -ENODEV;
+		}
+	}
+#endif
+
 	/* Store the device flags so we can use them during attach. */
 	usb_set_serial_data(serial, (void *)device_flags);
 
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 0017f6e96..86915a76a 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -436,6 +436,22 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
 	if (intfdata->use_zlp && dir == USB_DIR_OUT)
 		urb->transfer_flags |= URB_ZERO_PACKET;
 
+#if 1 //Added by Quectel for Zero Packet
+	if (dir == USB_DIR_OUT) {
+		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6)
+			&& serial->dev->descriptor.idProduct == cpu_to_le16(0x9090))
+			urb->transfer_flags |= URB_ZERO_PACKET;
+		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6)
+			&& serial->dev->descriptor.idProduct == cpu_to_le16(0x9003))
+			urb->transfer_flags |= URB_ZERO_PACKET;
+		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6)
+			&& serial->dev->descriptor.idProduct == cpu_to_le16(0x9215))
+			urb->transfer_flags |= URB_ZERO_PACKET;
+		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C))
+			urb->transfer_flags |= URB_ZERO_PACKET;
+	}
+#endif
+
 	return urb;
 }