@Bagus1308 When they lose the internet access, are they still connected to the network? Is there still an IP address on the devices? Try to ping the gateway of the WR940N when there is a valid IP...

@John-boy Hi John, sorry that I missed this post. Actually we can follow this up on the other post, and I have given you some suggestions, please give it a go and confirm, thanks a lot.

@Craig75 This may need to be verified with the R&D, while if you actually don't encounter any issue with the modem usage, you may ignore it.

@DanielWW Hi, if you want to take full advantage of the Ethernet ports, you may choose Option 1, then connect the main modem's LAN port to the WAN port of the VR400, you will then have all the 4 LAN...

@dron601 Is 128mbps the speed tested by connecting a computer to the VR600 Wi-Fi network? Please check what is the link speed on the computer when connected to the 5G network:...

@RageSpawn Hi, you should refer to this one: https://community.tp-link.com/en/home/forum/topic/81462?page=1 As for the original firmware, you may get it via this link.