Problem unlock sm-g950u, modem COM found but not selectable
 

Only COM6(SAMSUNG MOBILE USB seial port) is listed and delectable, but the SAMSUNG MOBILE USB MODEM is on not shown in the list and not selectable.

Operation: Unlock
Selected model: SM-G950U
Selected port: COM6 SAMSUNG Mobile USB Serial Port
Software version: 29.3.1

Checking phone at COM6 no answer from phone
Done with Samsung Tool PRO v.29.3.1

Searching Samsung modem... detected COM4
Reading phone info... OK
Model: SM-G950U
AP version: G950USQU1AQGA
CSC version: G950UOYN1AQGA
CP version: G950USQU1AQGA
Product code: TMK
Phone SN: R28J411GGJP
Unique number: 9887FC4455574E4431
Reading IMEI... OK
IMEI: 357755080181306

Done with Samsung Tool PRO v.29.3.1