This is highly advisable. However, this is likely to be expensive, so if you have an option for pay-per-use, take that so that you can use it in emergency. For regular usage, our advice is to get local SIM card which provides voice and data access. See Should I get a local SIM card while I am in India?
If you are going to land in Hyderabad with neither your data plan or international roaming, please make sure you have the pick-up confirmed and have the details with you. Do carry the local number of our volunteers or conference committee members for emergency, and try to carry cash. See Do I need to carry cash with me?