Slow 4G connection only, but only sometimes -- SOLVED

I tend to agree the download speed of one device or another could have no bearing on the matter. The radios and antenna configurations could be very different the same as drivers etc… but as a reference point for trouble shooting having multiple devices did help here. The reporting by the software and/or the LED panel on top of the Nokia router are not very impressive. The signal strength indicator is just a quick reference so sure it is probably not sufficient. It does take effort and attention to optimize the placement of the router. I would speculate that the current location of the router in the middle of the house may have something to do with the signal bounce off surfaces in the house. It does seem crazy wrong that having it in the window with direct line of sight to the tower would not provide a better reception. It is easy to overlook screens that are not nylon or in one odd case here I discovered my wife and daughter were pulling down the "metal" blind inside the glass door which totally shielded the router. They did it to themselves but did not think about the aluminum blind between the glass when using it to darken the room.