@Atulanand5 To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.

@Fandangos Is there any QoS setting on the C5400? Try to disable it, then confirm.

@VM-Serverguy Hello, most of the IoT devices are connected to the 2.4G, right? 20 more should be OK, as tested in our lab, it is allowed to connect as many as 64 to the 2.4G.

@Patatas Hello, I'm afraid the current firmware doesn't allow to be downgraded to the previous version, while please help provide below details, and we will try to fix it on the current firmware,...

@AntonK Hello, thanks for reporting the heat issue. Please attempt the below to observe the outcome as suggested by Godzilla: 1. Put the router in a well-ventilated location or mount it vertically on...

@atasiss Hello, as far as I know the C3150 doesn't support Wireless MAC filtering, while it does support the Access Control, and it should support as many as 32.