@DimasDianugrah 

We all know this already. Nothing will change so may as well just close this thread. It's pointless even commenting. TP Link don't ever respond and if by some chance they do, it's the same useless response. 

To put it simply, go buy a better system. 

Mine is still going strong and if I need to change the channel, jI ust reboot the system or do a network optimisation.

  @David-TP 

This was last visited in 2022. Pretty lame support given such a simple request.