(n)
reminder or mobile phone call that acts as a reminder.

The intention of the caller is to remind the receiver of some particular event or task. Generally, the receiver would have made the request for a 'missed call'.

This term originated in India after the mobile boom. The caller identification is a default feature in most of the mobile phones; hence this peculiar use.

When you eat dirt for the first time and leave your family to build a shack in the woods

A call to a cellular phone that was not answered, where the caller leaves no message.

The called is expected to return the phone call.

See Phone Tag.