VID/PID 1199/9055 for NAT mode
VID/PID 1199/9057 for IPT mode

Small update is here. On new ROS v36 Data and Info Channel were changed from 1 to 3. 

The only thing you must do is to enable "Ip pass through" mode. I couldn't use this modem in default NAT mode. See screenshot number 3.
Don't forget to use right APN name in modem init string. In my example, it is different from your APN name.

Yes, it is. And 

I successfully connect Netgear 341U in IP Passthrough mode to Sprint network. I used 35.4 firmware. As described above, you need set to yes "Ignore DirectIP modem" in System->Ports->Firmware. After rebooting your mikrotik device, you should see usbX port. Use this port for ppp-client, Data...