@Simpleform Hi, Did you mean the internet connection type on the Deco X20 is PPPoE? Have you tried the following suggestions: Remove QoS settings: Deco APP>>>QoS>>>(Set Application priority to...

@DrBrian Thank you very much for the feedback. We have tested on our side and the internet speed stayed the same before and after the firmware 1.5.0/1.5.1 upgrade; So if you had any speed issue after...

@Louieeeeeeee Hi, the external diameter and internal diameter of Deco M5 v3 are almost the same as Deco M9 plus. Thanks.

@Wahab_Durani Hi, the Ethernet cable would affect the speed and the router would do as well. So leaving the Ethernet cable match with the router Ethernet standard(such as Fast Ethernet port(100M/s)...

@SIMSIM Hi, thank you for your patience. May I know the current firmware of the Archer VR400? Have you tried to change the wireless settings, such as: https://www.tp-link.com/en/support/faq/2794/ And...

@PasKy Thank you for sharing. If anyone had the above issues, after trying the provided suggestions, if the issue is still unsolved, please feel free to let me know. Thank you very much.