my computer could not detect verizon s6 diag mode

any idea how to make my pc detect verizon s6 diag mode. my pc keep showing that yellow sign.

plz help any way to do that even if it requires root or super user..

thanks in advance.

Does G900a or G870a work in USB Diag Mode for QPST?

Does the G900a and/or G870a work in diagnostic mode for QPST, or does the locked bootloader prevent this?

I'm trying to test turning on the Tmobile LTE and the extra GSM channels on a G870a but device is not recognized by the computer as soon as I switch to rndis + dm + modem + adb.

Official Samsung USB drivers, debugging enabled, standard reinstallation tricks and such already tried. What am I overlooking? Used the right cable too...

Or is this just a non-starter from the bootloader?

Thanks!