According to your description, this service is called fixed-line and bound mobile phone co-vibration service. In addition, you can also handle the call forwarding service, that is, when you set the call forwarding function, as long as someone dials your phone, the incoming call will be automatically transferred to your preset fixed phone, mobile phone, voice mail and mobile secretary desk, thus avoiding the loss of incoming call information. Do whatever you want, convenient and flexible. Users can call 10000 via mobile phone, Internet, so that users will not miss important incoming information.
If the above information can't solve your problem, you can call China Telecom's customer service hotline 10000 to ask online customer service for help.