@Benji409 You can use in Router Mode because in AP Mode sometimes Deco and Router do ip conflict which create network problems.

@topley Deco XE75 Pro is a upgraded and powerful Deco as compared to X25 so if you don't have budget issue you can go for XE75 Pro which has better features as compared to X25 and i'm not sure it...

@Benji409 Go to Deco App then Go to More then Go to Internet Connection and then send me the screen shot.

@Benji409 Show me your Deco X10 network type and which DNS are you using ?? And are you using DNS server in DHCP Server or not ?

@topley I think you should place the Deco 2 in the dining room because Deco 3 will get better signals from Deco 2 if you choose to get signals from Deco 2 to Deco 3 by using Connection Preference...

@Benji409 MTU means Maximum Transmission Unit which is used for internet connectivity 🤗 Are you facing network issues on your TP-LINK EX220 router ??