The Surface Pro LTE is just available since hours, now Microsoft has released a 0-Day Firmware update with drivers.
The package has been announced at this blog post, the installation of the update package SurfacePro_LTE_Win10_15063_1714307_0.msi requires Windows 10 Creators Update, Version 1703, or higher. Here the fixes, that improves system stability:
- Surface GPS (v126.96.36.199.913) .
- Surface GPS Multiplexer (v188.8.131.52)
- Surface GPS USB Multiplexer (v184.108.40.206.717)
- Surface UEFI (v233.1903.770.0)