I have check again for modem issue and script is as it should be according information i have found on pit as well users report fetched.
Here attached new apk with changes SD card location path just check it if works.
Put modem.bin and NON-HLOS.bin both files on Int SD card (just on root, not under any folder) and select flash modem - grant supersu permission. - once you get msg modem flashed reboot device.
If not flashed yet Repeat it once again to flash modem with Airplane mod
If still issue, it's likely samsung have some blacklisting.