Please, stop using 40MHz in 2.4G, and don’t use any channels other than 1,6,11, be a considered neighbor, all those CCTV, smart home and printer don’t actually require any speed higher than 5mbps, plus they r sleeping most of the time. Also, it will cause more interference due to wider band, u r interrupting ur neighbors so do them, urs n their Wi-Fi will become unstable.

From the results posted by the author, I can tell his phone is only 1x1 antenna, it’s quite normal for 2.4G to get 30~50mbps, if 2x2 it will become 60~80mbps, really ok for an 2.4G devices, so don’t worry about it.

This post has been edited by heidarren: Jan 9 2020, 12:20 AM

To design a good Wi-Fi in home, 1st u must have a clear idea, 2.4GHz is for compatibility and coverage, for those home devices which doesn’t require high speed, so stability and usability is the target. Any devices that require high speed, they should go for 5GHz.

Your 2.4G is a big trouble for your neighbors and they are interrupting you too, bear in mind that not only router send signal, but also clients, and it's not showing in many wifi tools, not that simple, I will choose channel 11 with 20MHz based on this graph.

Channel 100 for 5G is almost always clear in Malaysia, but I will choose channel 52 since it's clear too based on the graph, due to wifi is always 2 ways to do, router to client and also client to router, not many clients supported channel 100 in Malaysia, more important is when we design a wifi, we have to consider the tx power of our clients too, for example my phone:




As you can see, channel 52 is 168mW and channel 100 is 171mW, almost same but due to lower frequency, my phone is actually doing better in channel 52 and bigger coverage since now my client is able to respond in farther side. Why not channel 149 since it does 275mW? It's much higher frequency so it requires higher tx power means it drains my battery, also it's not recommended to use channel 149/153 for Apple devices according to Cisco, they are actually the one who worked together with Apple for wifi design, they knows it better. You may check you clients tx power for better understanding how to bring the best out of them.