how i connect my phone having tata net in my phone to my laptop please guide me?

its simple if you have bluetooth then connect your PC with mobile using bluetooth . for this go to control panel and turn on your PC (and also turn on your mobile's bluetooth) then when you will connect using a pass word a list of bluetooth services available from the mobile will be presented to you (or if they are not presented on the desktop then you can go to control panel > bluetooth > devices > services) there will be a service to use your phone as a modem click that and follow the instructions to dial up & connect and njoy..

if you have the usb (or any other ) wire that connects your mobile to PC then connect it via that and then again you can explore the services you can use with the device (it will be there as you haven't given the mobile brand i can't tell you exactly what will happen) but all mobiles as soon as connected will give an option to be used as a modem you can click that and use it...

all the best

Your question is not clear. If you are asking for help in connecting your laptop to internet using your mobile then here is the answer : " Use/Tether Android Smartphone as a Modem

Use the USB cable that came with your phone to connect your phone to yourcomputer. Press Home , press Menu , and touch Settings to open the Settings application. Touch Wireless & networks > Tethering & portable hotspot. Check USB tethering.The phone starts sharing its mobile network data connection with your computer, via USB connection. An ongoing notification is added to the Status bar and Notifications panel. Uncheck USB tethering to stop sharing your data connection. Or justdisconnect the USB cable."