Utilizing extra text message space

摘要: Described is a technology that uses the unused (free) space (that not occupied by text of message) to encode metadata into message. The may correspond an advertisement, sender's mood, location, and like. inclusion advertisement can help reduce user's cost, while other types data number messages need be sent, without requiring typing in information. receiving device processes determine action take, such as display identified metadata, along with text. content have been previously downloaded anticipation its later display.