@Kevin_Z there is no option for speed control in Guest mode.. I have 50 Mbps plan and would likes to reserve 5 Mbps for guest network so that it will not affect my speed.. but this Archer C 20 (WISP)...

@Kevin_Z I have been trying to upgrade Archer C20 for the last 1.5 year. Today on 12th feb 2022 found ARCHER C20 V5 (INWISP) file on Internet.. I upgraded firmware version but still no benifit bcz...