yup...it'll work there...buy a pre-paid sim card from there...they're very cheap compared to here, and you'll get cheap incoming calls and can use VOIP phones at cyber cafes to call abroad if you have to! Airtel and Hutch are the 2 major carriers - both are good. You can google for their Indian websites.
I will be travelling to India shortly for several weeks. I would like to be able to use my motorola Razr V3 while there. Can I just buy a new SIMS card once I arrive in India? Should I buy one before I go or would it be cheaper to do it once there? Anything else I need to know about using my cell phone there before I go?