The mobile phone card is from China Unicom. If I don’t answer the phone, I want to leave a voice message on it and ask him to send a text message. How do I set it up?

Dear users, according to your needs, our company's "Unicom Secretary Desk" business can currently meet your needs. Now let's introduce this business to you: 1. Product introduction: China Unicom’s secretarial desk business can provide personal secretarial services. When you turn off your phone or it is inconvenient to answer the phone, China Unicom Secretary Desk will answer the call on your behalf and send missed call information to the user in a timely manner. It can also support various scene mode settings. The monthly subscription fee for China Unicom Secretariat Desk ranges from 3 to 15 yuan depending on the services it provides. Products of 10 yuan/month can be opened according to your needs. 2. Function introduction: After activating the secretary desk service of China Unicom, you can call the secretarial service hotline: 10198, set the "scene mode" or "voice mailbox" through the customer service staff, and then answer the call when it is inconvenient for you. When making a phone call, you can directly transfer the call to the China Unicom secretary desk with your mobile phone number. You can achieve your needs. Thank you for your support, I am very dedicated and I hope you will be 100% satisfied!