I have Charter/Specturm via cable, here in Glendale, CA. I am told by them I have the fastest speed available for residential customers. I am also told by modem and router are "up to date" and the latest available. Internet speed and connectivity not spectacular, but pretty good. BTW - The 3G Samsung Extender I reconnected has and does work well, but I have to change my iphone XR LTE setting everytime I leave or return to the house. Really frustrating when I forget. Got the "new" 4G extemder just to avoid that.