I'm currently using a Netgear Nighthawk AC1900 adapter and it keeps doing this. Adapter I used before Netgear also did this. Issue is if I go back to 5 GHz network I get lower speeds similar to 2 GHz network. I think there is a USB mode switching between those 2 networks.
Is there a way to stop this? Can't I use usb 3.0 in 2 GHz network as well?
P.S :
I have managed to resolve the issue by changing the Wireless Network Mode of my 5GHz router to AC-only. (Previously it was AC/N-mixed which made wifi adapter not needing to go back to high speed mode when switching from 2.4 GHz network since 5 GHz network also supported 'N' .) By making 5 GHz AC-only, wifi adapter is now forced to switch between USB fast and slow modes.
But I still don't know why there are two modes implemented in those USB adapters.
Is there a way to stop this? Can't I use usb 3.0 in 2 GHz network as well?
P.S :
I have managed to resolve the issue by changing the Wireless Network Mode of my 5GHz router to AC-only. (Previously it was AC/N-mixed which made wifi adapter not needing to go back to high speed mode when switching from 2.4 GHz network since 5 GHz network also supported 'N' .) By making 5 GHz AC-only, wifi adapter is now forced to switch between USB fast and slow modes.
But I still don't know why there are two modes implemented in those USB adapters.
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