Have read many posts and am convinced I have some type of configuration issue. All of my new devices (e.g., iPhone XS, Surface Pro 6) seem to top out at 100/100mbps. I don't use mesh, have 3 R500s and a ZD 1200 connected to Verizon FIOS Gigabit internet which delivers 800+mbps to my hardwired devices/PCs. Have setup separate 2.4 and 5 networks and they all seem to max out at 100mbps. Just seems too coincidental. It's a private home with no interference. Thanks