@KiranMore Hi, are your mobile phones all Android phones? Please try to follow the solution on this thread to see if it solves the problem: Some client devices have no internet access such as Android...

@Jasi770212 Hi, if the powerline LED(looks like a house) on the AV600 is off, it means it is not paired with your powerline adapter, please refer to this guide to pair it first: How to secure (pair)...

@Chester243 Hi, except for the firestick 4k max, is your other wireless client device able to see and connect the WiFi of AX1800? If the issue happens with the firestick 4k max only, please check if...

@CrazySpy Hi, please try disconnecting all the Ethernet cables from the non-working TL-WR840N, then check if the LEDs will be on stable. You could also try resetting it again after removing the...

@Speedtest Hi, when you enable 5GHz WiFi, please disable Smart Connect, set different WiFi names for the two bands, then please test if the problem still exists. In addition, usually how many client...

@SkyHsu Hi, thank you very much for posting on TP-Link Community. Please confirm below details: If your son's device is a smartphone, please confirm if it enabled VPN software If your son's device is...