Need advice to improve my home Wifi coverage
I'm running a Netgear N750 wifi router out of my basement, connected to my Motorola Surfboard modem, and going out to the Cat 6 network cable (via a couple of hubs) throughout my home. The Wifi in much of my house is extremely weak no matter how I arrange the antennas, etc (this is a ranch with a basmenet, wood frame). I've used the Wifi analyzer app on my Android which confirms that I have good signal strength on both my 5G and 2G bands, with little overlap of neighboring networks. I'm a bit confused then as to why my devices (Android smartphones, Ipads, PC laptops, etc) all have weak connections (iPads are weakest of all and often fail to connect). Since I cannot relocate the router, what are my best options for improving my coverage?