How does Unicom card send information to open night traffic packets?

Different cities have different opening modes. For example, the 2G/3G night traffic packages in Shaanxi include 500MB package in 5 yuan, 1GB package in 20 yuan, and 3GB in the province. You can enjoy the traffic discount from 23: 00 to 8:00 the next day, and the traffic charges outside the package, busy hours and provinces are charged at 0.0003 yuan /KB. The corresponding instruction can be sent to 100 10 to process the night traffic packet: 1. Send 709 1 for 500MB 5 yuan package; ; 2. Send 7 10 1 Handle 10 yuan Package1GB; ; 3. Send 711to handle the 20 yuan package of 3GB. You can also call 100 10 for manual customer service or bring the original valid ID card to the business hall of Shaanxi Unicom. The agent should bring the original valid ID cards of the owner and the agent. Tips: You can contact the customer service of the number or the manual service application of "China Unicom" WeChat business hall, and you can choose to take effect immediately or the next month. If you don't choose the default, it will take effect next month. Subscription to SMS Hall will take effect immediately, and unsubscribe will take effect the following month. Other cities suggest consulting the customer service to which the number belongs.