Wireless 5Ghz doesn't work in Archer C20 V5

[frollic]

Linaro can be found in

Porting Firmware to TP-Link Archer C20 v5

I read from the following post that the V5 has similar hardware as the v4, so I thought there might be a chance for my v5 to transform. [v5] It seems the most of the hardware's are the same. Does it mean I should be able to directly use the firmware for v4 to flash my v5? Any hardware checking needed before installing? Any changes needed on the firmware to fit my device? From the installation instruction, it seems safe to do experiments, since it is said that you can always flash the sto…