What is minute rounding?
This term refers to rounding off the minutes of a call if it falls under the per-minute fees charged at that time. For example, 3 minute rounding means the billing is in three minute increments (3, 6, 9 etc.). If your call lasts for 2 minutes, you will be charged for the full 3 minutes. Similarly, if your call lasts for 7 or 8 minutes, you will be charged for the full 9 minutes. Some cards do not use this method of billing and say so.
Minute rounding is the time unit used by the manufacturer to round up your talk time. Usually, time rounding ranges from one minute to three minutes. For example, if you talk for 23 minutes and 37 seconds, manufacturer will count for 24 minutes assuming that the card has 1 minute rounding. It is a convention for the telecommunication industry. The exact time rounding is included in the Card Details section.