@NahidChowdhury If the connection is not stable on the router, please refer to the below article to do some basic troubleshooting: https://www.tp-link.com/support/faq/722/

@tblinkarchera5 Kindly refer to the below guide to configure the IPv6 on the router again: https://www.tp-link.com/support/faq/1525/ If the connection still fails, please confirm again if the IPv6...

@Archer-C6 1) Can we have some screenshot about the notification message on the Android phones? Try to change the wireless settings on the C6, such as wireless channel, channel width, and security,...

@hun0ter Got it. Please confirm the details that we confirmed preciously with others, is there still a WAN IP address and DNS server on the C4000 when the internet drops? How about the internet LED...

@hun0ter Hi, is the model number Archer C4000? Which firmware are you running on now? Please check if there is a new firmware for it.

@Innocentone Thank you very much for all the detailed info. We have reported the issue to the support engineers, they will likely reach out to you via email to continue to troubleshoot your issue.