Note  :

Detailed bill for all plan is FREE.

You can know the tariff plan suits you the best by giving the average metered units   made by you monthly.

If you get bi-monthly bills, bi-monthly metered units is mentioned in your telephone   bill. So, monthly metered units can be achived dividing the metered units by "2".

Those who are receiving monthly telephone bills, they can give the average metered   units mentioned in their bills.