Hi Ankit,
In order to connect to internet through the use of your Samsung Star 5233A, you will have use your phone as a modem.
You have however omitted to indicate us your network provider.
Let us suppose that you are using Airtel services. Get on the "Communication" tools which is available in the "Accessories" on your PC.
You will then have to create a new connection wizard. It is not so difficult.
You be setting the connection manually.
For dialing up the modem, please type Airtel, your phone number and make it available to be used by anyone.
You have hence made the connection set up.
While trying to launch it, you will be asked your user name and password which should be made available to you by the network provider.
Hope that this information solves your problem. Otherwise, please kindly contact your network provider.
Thank you.