Help With G920F S6 Not Been Detected By Z3X

Ive got an s6 g920f with no imei, I’m trying to repair with pro v27.0 but the software wont pick the handset up.

Z3x will flash the handset in download mode, reboot handset to download mode. repair drk.

It will pick the handset up if its searching for ADB device but when z3x says searching Samsung modem it never picks the device up.

Anyone got any ideas??