Best places for Dosa and Idli are
Ram Ki Bandi near Mozamjahi Market, it gets open in the early morning at around 3.
Pragathi Tiffin Center near Hanuman Tekdi.
Govind Dosa near Charminar.
Ram Bharosa Center's
Also because of the trend, there are now many stalls and shops which prepares best Idli and Dosas.