I am an user of HDFC bank since last 4 years. There services are very well, fast and hassle free. customer service is very well. There phone banking number is 9831073333 for west bengal customer only. Transaction are available for 24X7 hours. ATM service service is very well from the side of service. They have total 12054 ATM s in all over india. Internet banking service is very well. and net banking site is very fast. https://hdfcbank.com is the net banking site. customer support is very well. and customer support no is 1800221006( Toll free). You do not need to pay bill to call at this number. Thank you.