@NZ_Rhino I'm using Deco M4 (V2) on firmware 1.7.0 which is working fine for me and there is no issues.

@RajiZ Delete the Deco App and install it again.

@maaxxicarvalho Check QoS speed limit if the speed limit is set to 100 Mbps so please change the QoS speed limit to 1000 Mbps or Turn it OFF to get full speed.

@JamiryoFC How much linkspeed your devices are getting in the WiFi settings? Like im getting 433 Mbps linkspeed on my phone. If you are getting 866 Mbps linkspeed on your devices so your internet...

@AnanthR Many users had this problem after latest firmware updates on different Deco models.

@AnanthR Check QoS if the speed limit is set to 250 Mbps so please remove the QoS or set it to 1000 Mbps