@JohnnyGoRJ The isolation between guest network and main network only works in regular router mode only, if you want to turn it off, you can change the Deco into AP mode as a workaround. Meanwhile,...

@beardhunter Sorry to tell you that we do not have the ETA yet; it is recommended to keep an eye on official website instead. Wish your kindly understanding.

@HelenD You need create an account to login to the Tether app, while the login password to access the RE450 is different, it is admin by default; you can hard reset it if it still does not work, and...

@johne53 What is the current network diagram? Please mark their model number as well, especially the new extender you bought. Meanwhile, what is the led status of it when it lost connection? WIth...

@evertech Have you ever tried to change the DNS server and create a network profile for the MR400 manually with the APN information? Meanwhile, when and where did you buy this router? Good day.

@b9surfer Take your time to give it a go, any updates, please let us know. Nice day.