Joke Collection Website - Blessing messages - Why does it always say to ask the mobile phone manager to notify you when calling a China Unicom mobile number?

Why does it always say to ask the mobile phone manager to notify you when calling a China Unicom mobile number?

The services in different regions and cities are different. For example, the Guangxi Mobile Butler product is a product package, including SMS call forwarding, SMS storage, SMS call forwarding, mobile secretary, call waiting, and call forwarding*** 6 sub-products. Maybe the China Unicom number you dialed has activated this service. If the mobile phone has no signal or is turned off, etc., the mobile phone manager function will be enabled. For details, please contact China Unicom customer service at your home location.