@Happie Hi, nice to see you again. Have you checked on the Deco App whether the satellite Deco X20-DSL is working properly on the Ethernet Backhaul, instead of WiFi Backhaul: After that, please also...

@Im-New-To-This Hi, thank you very much for the feedback. Have you tried the suggestions listed here:...

@User72536 Hi, yes, Deco BE85 supports TCP MSS clamping. It is derived from the MTU size. Best regards.

@DuncanS Hi, can you detect the default WiFi of this Deco AX1500 on your mobile phone? Have you tried to manually add this unit on the Deco APP, such as: How to add an additional unit to your Deco...

@asifddlks HI, it is suggested to use the original power adapter. Insufficient power supply may lead to network instability. Best regards.

@MDUK Hi, The Ethernet cable from Deco M4 can't provide power. you might need a PoE adapter. such as TL-POE160S https://community.tp-link.com/en/home/forum/topic/660398 Thank you very much. Best...