Short of connecting 2 routers together via Ethernet cable with 1 as 5Ghz router and 1 as 5GHz access point, I am not aware of any Gl.iNet router with dual 5GHz radios, only separate radios for 2.4GHz and 5GHz.

Here are some options:

  1. If the smartphone is compatible with the router, then you can try USB Tethering which may give you higher speed, but likely not the full 230Mbps due to processing overhead.

  2. If your smartphone runs Android 11 or higher, then you can try plugging in a USB-C-to-Ethernet adapter ($10-$15) into the smartphone, connecting an Ethernet cable from the adapter to the router WAN port, and enabling “Ethernet Tethering” in the hotspot settings. This should not be compatibility issues over standard Ethernet.

  3. Netgear and maybe other brands makes tri-band extenders, which has two 5GHz bands and one 2.4GHz band. I have not personally tested one, but one of the 5GHz bands can be dedicated to connect to the source router and the two other bands can be used by destination clients.