Ubuntu unable to detect Huawei E392 USB modem with Airtel 4G connection

Question

Ubuntu unable to detect Huawei E392 USB modem with Airtel 4G connection.

Output of lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp. 
Bus 002 Device 002: ID 8087:8000 Intel Corp. 
Bus 003 Device 002: ID 0461:4d15 Primax Electronics, Ltd Dell Optical Mouse
Bus 003 Device 003: ID 04b3:3025 IBM Corp. 
Bus 003 Device 006: ID 12d1:1505 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard

Output of dmesg

[  331.084423] usb 3-7: new high-speed USB device number 6 using xhci_hcd
[  331.103177] usb 3-7: ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  331.103184] usb 3-7: ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  331.109954] scsi8 : usb-storage 3-7:1.0
[  332.109577] scsi 8:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 0
[  332.157291] sr0: scsi3-mmc drive: 0x/0x caddy
[  332.157626] sr 8:0:0:0: Attached scsi CD-ROM sr0
[  332.157852] sr 8:0:0:0: Attached scsi generic sg1 type 5
[  332.291031] scsi 8:0:0:0: killing request

Can someone please help me with a solution?

Answer 1

Run in terminal

sudo -H gedit /lib/udev/rules.d/40-usb_modeswitch.rules

and add a line to the file

ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="1505", RUN+="usb_modeswitch '%b/%k'"

Then run

sudo -H gedit /etc/usb_modeswitch.d/12d1:1505

And paste this text to the editor

 TargetVendor= 0x12d1
 TargetProduct= 0x1505
 MessageContent="55534243123456780000000000000011062000000100000000000000000000"

Save the file.

Unplug the modem and plug it in again. In about 20 seconds try to create a connection.