@Dlc You can get 220Mbps from your router wifi, right? This is got when your device is connected to router's 5G wifi. Normally, 5G wifi has better speed than 2.4G wifi, but 850RE only supports 2.4G...

@Langa Please check this Guide: Adding an additional unit to your TP-Link Deco network

@Chlo There is no utility for range extender. You can just login to 850RE web mangement page to set Power Schedule. 1. Connect your device to extender wifi. 2. Login to extender with...

@PG17 Please follow this to reconfigure RE205: Range Extender Setup video

@Seb.lumsden-1 You have changed you router wifi password, but not reconfigure your extender, right? Then your extender is not connecting to your router wifi, so internet is not available via extender...

@Jose_Maria I tried to find some information about your router. And I noticed that your router has band steering function. From my experience, this may cause unstable issue. Please disable that...