NR5103E won't connect to 5G

[EddersD]

I just set up my new router and I can't connect to 5G, I seem to be limited to LTE only. My phone connects without issue.
Firmware is V1.00(ACBJ.0)b9 and I've been reading about b10 solving some issues (although those people were coming from b8). Any way I can force this update? I've tried looking for the firmware download in Zyxel's website with no luck

[Turbulence]

Hi I am having the same issue 150m from the 5g Mast full signal and speed on my phone on router poor 5g signal and speed whilst full LTE full signal only installed Friday support saying that the router users a different mast?!