@David-TP I changed main Deco already. Because, I had cable connection with modem and I was using another Deco as main Deco. When I decided to use a modem with LTE (SIM card), I replaced with...

@David-TP My internet speed is 250 Mbps from speed test of Deco. QOS is closed. The speed of connected iPhone is 40 Mbps with main Deco, even if I connect iPhone to satelite Deco, speed reduced to 24...

Hi, Deco M5 has very slow WiFi connection. I am connecting main Deco, which is connected to Internet with cable. If I connect cable to my Mac, I can see 120 mBit/s however, WiFi connectin of Deco...