How to install HUAWEI E1550 on ubuntu

Steps:
Execute the following commands:
 $ sudo -s
 $ sudo apt-get install udev-extras
 $ sudo lsusb

Add a udev rule:
  $ gksu gedit /etc/udev/rules.d/15-huawei-e1550.rules

Paste this and save:

SUBSYSTEM=="usb",
SYSFS{idProduct}=="1446",
SYSFS{idVendor}=="12d1",
RUN+="/lib/udev/modem-modeswitch --vendor 0x12d1 --product 0x1446 --type option-zerocd"

Right click on NetworkManager Icon, select Edit connections -> Mobile BroadBand

Click on add button, Select "Airtel" service provider and Connection name save as Airtel.

Once the above settings done, please remove the device and Insert it again.

It works.

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