The single rate of 50 paise per minute applies to
- all local calls
- all STD calls
- to any mobile CDMA or GSM or Landline from anywhere in India
- all incoming and outgoing calls while roaming
- anytime of the day or night
- all SMSes – local or national
- without any monthly charges for prepaid
Interesting part is the roaming which is also 50 paise per minute