Calls are charged on a per minute basis; partial minutes are rounded up for billing. For example, if the call duration is 4 minutes and 19 seconds, it will be rounded up to 5 minutes for billing.
F.A.Q.
How are minutes rounded for billing?
Calls are charged on a per minute basis; partial minutes are rounded up for billing. For example, if the call duration is 4 minutes and 19 seconds, it will be rounded up to 5 minutes for billing.