I have an E3372h-153 (T-mobile Hungary) modem ndis-ppp firmware, which did not work at first because of the need of usb modeswitch. I could fix the problem using the AT^SETPORT command. The original mode was: AT^SETPORT="A1,A2;12,1,16,A1,A2" I set the modem to: AT^SETPORT="FF;12,1,16&...