What channels can 4G traffic packets be handled?

Hello, taking telecom as an example, telecom users can order traffic packages through channels such as telecom customer service and telecom online business hall. Taking the method of ordering traffic packets in telecom online business hall as an example, this paper introduces the ordering method:

1. The user opens the online business hall of China Telecom, then clicks Business, and then clicks Traffic Packet.

2. Then choose the traffic package to place an order?