A software update corrects the following issue with your Z400 by Samsung®.
There are 2 issues related to call alerts going to the wrong number:
When you try to send a Call Alert to a contact that is stored with a regular
phone number and a separate Direct Connect number, the Direct Connect number
is not automatically selected by the phone and so the Call Alert may be sent
to the wrong number. The Call Alert is sent to the number shown below the
contact name on the screen.
When you try to send a Call Alert to a non-Direct Connect capable number, the
Call Alert will fail, the number stored in the device will be flagged as
Direct Connect capable even though it is not a Direct Connect number, you will
receive a bonk tone over the phone and an error message will be
received stating that the Person named is not reachable via Direct Connect
or this number is not Direct Connect capable.
To fix this, please update your handset software to version Z400.BI22 or greater.
Note: At any time, you can check that you have the latest software version for your phone. For instructions on how to check your software version and update your phone software, refer to Check for Updates.