The Huawei Mate 20 is often purchased in combination with a new mobile phone contract. Thus a mailbox for the new phone number is usually also active.
Calls that are not answered by you are automatically forwarded to the mailbox.
4. Press the Call key (green handset) to send the network code.
The call forwarding to the mailbox has now been successfully removed and is no longer active on the Huawei Mate 20.
Your smartphone will ring until you accept the call or the caller hangs up again. You now know the easiest way to switch off the mailbox for your Huawei Mate 20.