A type of mobile phone missed call where the caller deliberately cancels a call after it has started ringing but before the recipient can answer. An act designed to encourage the recipient to phone the caller back, thereby making the original recipient pay for the call.
Recipient: Did you just drop call me?
Original caller: Yeah, sorry, I've got hardly any credit.
A method of checking up on a person's movements using the report features of SMS texts that let the sender know when their message has been received. Useful when the recipient may be in an area with no reception such as a subway system.
I'll report stalk you so I know when your tube has arrived.