I have an EM9191 that had firmware SWIX55C_01.07.19.00 originally on it. I was able to get it to enter the factory test mode with the below commands.
AT!ENTERCND=“A710”
AT!DAFTMACT
I have update the firmware to SWIX55C_03.09.14.00, but when running the the AT!DAFTMACT command it returns “+CME ERROR: operation not supported”. Any idea why?