How to install Tata Photon plus (156) in
Ubuntu 12.04. Here is the step-by-step procedure for beginers:
- Once
     you boot your Ubuntu, right click the networking icon from Desktop on top
     of the screen
- Tick
     on Enable Networking
- Select
     Edit Connection
- Choose
     Mobile Broadband
- In
     “New Mobile Broadband Connection” window screen click on Continue
- Choose
     your country as India and then click Continue
- Select
     your service provider as “Tata Indicom (Photon+)” option and click
     Continue
- Next
     click “Apply“ button
-  In
     the “Edit Tata Indicom(Photon +) Connection1” window select Mobile
     Broadband and enter the following without the double comma”
Number  as “#777”
Username as
“internet”
Password as
“internet”
- Click
     on “Mozila Firefox” ferom desktop
- Select
     Edit/Preferences/Advanced
- In
     the “Connection settings” window select “No Proxy” option
This is not the end for your
configuration. Explained below requires a bit experience in Linux.
13. Ensure that your plug in the Tata phone Plus data card
in the USB of your PC/Laptop. 
14. Make sure that you have installed the following packages
* usb-modeswitch-data
* usb-modeswitch
15. To install them : Open the terminal Go to the directory where you've downloaded the packages and install the packages in the following order :
# sudo dpkg -i usb-modeswitch_*_amd64.deb
# sudo dpkg -i usb-modeswitch-data_*_all.deb
# sudo dpkg -i usb-modeswitch-data_*_all.deb
You should be able to connect the data card now. 
Otherwise reboot the system and enable networking and Mobile
Broadband options as mentioned above.
Feel free to write me for any queries.
Cheers!
