You may also try prepaid currency cards. Just top-up and use as local debit card. Almost all the big banks issue them now a days. E.g. Citibank, HDFC Bank, ICICI bank etc.
Card ChargesHDFC charges Rs 150 on the USD card while ICICI Bank and SBI Bank charge Rs 110 and Rs 150 plus 12.24 per cent of amount respectively. The reload charges in case of SBI, ICICI Bank and HDFC are Rs 100, Rs 55 and Rs 100 respectively.