Here you go. I called the customer service centre guy. He told me with djuice package plan you can add another FnF number (5 already). On that 6th Fnf Number You can call for60 paisas. per minute for 24 hours of the day.
Charges are very Cheap.
Here you go.
Adding number will charge you 2.42 R.s (includding all taxes)
Calls per minute: 60 paisa per minute (offcourse includding all taxes)
Note: Limited time offer.