No service provider will garantee full coverage without having to pay extra. BT for an extra £5-10 a month will supply their mesh type system so will Virgin with their pods. Its always better just to buy your own though
Hi, you could also try resetting your phones network settings. Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Then reconnect to wifi and try again while stood by the hub. Also make sure its not near consumer unit o...