Thanks, yes it is detected as a LTE device, however it gets stuck as per this post by another user: http://forum.mikrotik.com/t/sierra-wireless-aircard-320u-lte-mode/71021/1
The modem works perfectly using the Sierra Wireless Direct IP drivers on Linux computers fine, it just seems RouterOS has some issues with it.
I’d offer you remote access but my ISP don’t offer static IPs. I can give you access with the current IP, then you whip up a script to email you the new IP when you reboot the modem…