Installing USB modem ZTE AC2726 in Ubuntu 9.04 Jaunty

Recently i successfully installed ZTE AC-2726 modem that came with reliance wireless broadband connection. Below are the steps:

Insert the modem in USB interface and see if that gets detected.

$ lsusb
Bus 005 Device 002: ID 19d2:fff5

I noticed in /var/log/messsages that the device is detected as usb storage. To make it detected as modem we will use usb-modeswitch package. It is a Switching tool for controlling "flip flop" USB devices.

Download usb_switch package from here and install.
$ sudo dpkg -i usb-modeswitch_1.0.2-1_i386.deb

Unplug and plugin the modem back.

$ lsusb
Bus 005 Device 004: ID 19d2:fff1 <- Notice the change in product id

$ sudo modprobe usbserial vendor=0x19d2 product=0xfff1

You can see in the logs that the modem is detected correctly now. To detect & configure the dialer config run:

$ sudo wvdialconf

Check and add the missing entries in wvdial conf as found below:
$ sudo vi /etc/wvdial.conf
Phone = #777
Password = <Your Password>
Username = <Your Login Name>
Baud = 460800
Stupid Mode = 1
New PPPD = 1
Tonline = 0

Note: Give a valid username & password in the corresponding lines above and uncomment them (Hint: remove  ";" from the beginning of the line).

$ sudo wvdial

The connection started working. Note that you can also configure gnome-ppp or kpp to connect.