What is the telephone bill treasure of Hubei Unicom?

Hubei Unicom's "incoming call treasure" function: when the mobile phone is turned off or out of service area, it will keep missed calls. After the communication is restored, the system will send a short message to inform the missed number within 24 hours; Hubei Unicom's incoming call treasure is charged according to the article, and each short message with missed incoming call number is charged at 0. 1 yuan, which is capped in 8 yuan every month. Tips: 1. If the same user fails to answer the call for many times, he will be reminded by SMS for many times and will be charged; 2. When you dial the phone of the user who has turned on the caller ID, you will hear a voice prompt. No surgery, no charge.