If you want to forward an ongoing call to another phone and then leave the conversation, here is how to do it:
0) Make a contact e.g. called "Forward" og set the phone number to: 4
1) Call a person / receive a call, and wait for the connection to be established ->
2) Tap "Add Call", choose the contact you want to call, and wait for the connection to be established, then ->
3) Tap "Contacts"
4) Choose the "Forward" contact
5) Tap the phone number (which should be "4").
6) You will now be disconnected and a connection between the two other callers will be established.
0) Make a contact e.g. called "Forward" og set the phone number to: 4
1) Call a person / receive a call, and wait for the connection to be established ->
2) Tap "Add Call", choose the contact you want to call, and wait for the connection to be established, then ->
3) Tap "Contacts"
4) Choose the "Forward" contact
5) Tap the phone number (which should be "4").
6) You will now be disconnected and a connection between the two other callers will be established.