Deco M5 successfully set up thru app with green light, but no wifi signal generated
I've been using my 2 M5s with my old fiber internet service provider (modem provided by ISP was Huawei Echolife) without issues. Unfortunately, when my wifi connection went bonkers and my ISP'ss technician didn't show up for 3 weeks, I was forced to terminate its service and subscribe to a new ISP.
Before my new subscription, I bought a 4G wifi router for temporary use and tried to connect the M5 to it without success. Set up via app was supposedly successful with the green light on, but no internet signal coming from the unit.
2 days ago I had my new fiber connection installed with a new ZTE ZXHN F670L modem. Same issue with the M5 persisted. Successful linking in the app with green light on on the unit but no internet connection. I tried all 3 LAN ports available (4th is for my free cable tv that installer used), but none worked. Each LAN port lights up whenever I connected the M5 to it.
I already changed the operation mode in the app to ACCESS POINT instead of WIFI ROUTER yet nothing happened.
Anything else I should do to let my M5s work? Or is there something I should configure with the modem to make it connect to my M5s?