Is there a charge for SMS reminder in 365 calendar?

Just use 139 email to remind you of the schedule ~ you can use a few tips for free:

1) Set the mail arrival notification of 139 to the enabled state (free fall).

2) Schedule reminder It's time to choose email reminder.

In this way, when sending an email reminder, there will be a free SMS arrival notice, which is equivalent to a SMS reminder. The most important thing is that it is completely free ~