In my house I have connected 1 PC, 2-3 smartphones, and 1 tab through a PTCL router Sagemcom Fast 1704 and a TP-LINK router. It's a big house so depending on where you are you connect to either one of the device. The TP-Link router is connected to the PTCL one through an ethernet cable, and they both have different addresses. The problem I face is that plenty of times I want to connect to either one of the routers, any said device would connect, but the internet wont respond. To get it to work on one specific device involves a series of restarts on the router and/or the device, and that doesn't work all the time. Sometimes I'd get this issue on my PC too, in which case I'd flush the DNS cache, and that somehow works but I cant do that on my phones or tab and that isn't a concrete solution anyway. Can someone please tell me what's going and help me with this?