@tapac3 Here's the official procedure for recovery from a bricked router. I believe that C64 should be the Case 1 from this guide. If that doesn't work for you try the suggestions from this thread.

@MOdra Start with FW to exclude any FW issue with your bandwidth, There's no special tool for testing HW stability of your modem router but here are some practical guidelines: 1.Unstable wireless...

@MOdra Best way to know if that's because of the FW or the modem, is to downgrade (upgrade with an older version) the FW to the previous FW release and test.

@Lumi2100 If this is a similar issue ask for advise (post) in that same thread.

@Manx_Karl You can read in more details here about using ethernet switches to buld a Deco ethernet backhaul. If everything is correct with your switches and cables ethernet backhaul should take...

@pioche If your Router B is in AP mode you don't need port forwarding at all. But in this case devices connected to Router B would be able to access the devices connected to Router A - they would be...