How to cancel the call forwarding set by Unicom landline?

You can log off by yourself through the landline phone, as follows:

Cancel unconditional call transfer: after hearing the dial tone, pick up the microphone and press "#57#" to hear the confirmation tone.

Cancel the transfer call and don't answer: after picking up the microphone and hearing the dial tone, press "#4 1#" to hear the confirmation tone;

Cancel busy transfer: after hearing the dial tone, pick up the phone and press "#40#" to hear the confirmation tone;