Updated to 14.1 (and since that time to 14.2) and my phone frequently can't use WiFi anymore. I have to toggle WiFi off, then use phone's data, to access pages. I can use WiFi on some, but frequently hit "Safari cannot access ... no server." I then toggle off WiFi. I have been turning WiFi off and on now for days. It is SOOOOO irritating. It is also very very slow now operating. The update to 14.2 took 27 minutes!!! I only did it hoping Apple had fixed Wifi problem. But it hasn't. I took off Privacy setting on my home network, I rebooted home modem/router, I removed home network from phone and reconnected, and I deleted History/cache of Safari. I am not going to do an entire factory reset. But this is HORRIBLE that I can't use my own Wifi network reliably anymore and have to use my phone's cellular data.