Unisoc T603 It only has wifi 4, which means only 2.4Ghz, no application can convert to wifi 5 "5Ghz"
Prefer does not mean convert.
The application just says to prioritize the 5Ghz network over 2.4Ghz, but the device must support 5Ghz wifi, not that it converts from 2.4 to 5Ghz, that's complete nonsense what you're saying.