first you need to start the data modem on mobile.
Send an sms to aircel for WAP and GPRS settings. (you can get it done from my Aircel " or customer support.
you will get the sms settings. save them on mobile.
switch off- on the phone. check you mobile browser for connectivity.
if it is working (which it should), than proceed for PC settings.
Download PC-suite from internet site. install on you PC.
Connect your phone with PC (using Data cable / Bluetooth)
Your phone should be detected and drivers should be automatically installed for USB/bluetooth modem (if required , use your phone CD for driver)
Click on PC suite -> connect internet
internet connection should be made automatically.
(in case of problem, go in settings and check that "aircelgprs" is selected as access point in the connection window settings (configuration).