We have the same EchoLife HG1845V5 device. Mornings the WiFi was ok but by the evening it would slow to 3 Mbps with frequent disconnections especially if the weather was hot. If I rebooted the device that would help for a little while. I bought an ASUS router and connected it to the HG1845V5 device and that fixed the problem. Another problem we had with the HG1845V5 is it blocks access to the time service Windows uses to keep the time synced for our laptops/PCs. I posted a fix for that a while back.