Need help with opeining of Accounts

#1
Hi,
I want to start trading/investing in stocks in India. I live in chicago, but right now visiting India, will be here for another month or so. I need some help with choosing organizations for opening of Dmat, trading and bank accounts.
**which one would be cheaper, efficient, easily operable from overseas and other benefits.
I am stationed in Hyderabad.

Any assistance will be highly appreciated.
Thanks.
Adept