What's the difference between attachment SMS and ordinary SMS of Tianjin Unicom?

The attachment message of Tianjin Unicom adds two * symbols to the content, and between the * symbols is the content name, which represents a lot of wonderful content. Attachment messages carry voice messages to convey blessings, jokes, music or ringtones. When you send an attachment message to friends and relatives, the other party will not only receive the message, but also receive the voice. When receiving this sound, the receiver can hear the blessings, jokes or music you sent. The attached text message is wonderful. By adding blessings, jokes, music and other content, short messages can instantly become vivid, full of personality, simple and convenient to operate, and can be forwarded at will like ordinary short messages. Ordinary text messages are just simple words.