Hi, everybody! Glad I found this forum. I'm an original iPhone SE user. (As an aging Boomer, "SE" stands for "Senior Edition". 
)
We recently upgraded to the new FiOS router (G3100). I had heard all sorts of rumors that you had to set up static IP addresses in order to make wireless printers work. That was very true and I finally figured things out yesterday.
Relevant to this forum, iOS 14 hit both of our phones this week. All of a sudden we were getting pop-up windows stating we weren't connected to the internet. Worse yet, Facetime no longer worked on WiFi but worked fine on cellular. On WiFi, we had the same symptoms that another poster experienced in reverse. I did hard & soft reboots and reset network connections a couple of times with no effect.
To make a long story short, I also had to set up static IP addresses for our iPhones. You'll need to be logged on to the router admin page on a laptop or desktop in order to find the IP address that the router has assigned to the iPhone. Then, you can go into the WiFi network setting on your iPhone and manually enter the same address. You'll also need the subnet address which is usually something like 255.255.255.0. Everything on the phone, including Facetime, works fine now. I'll find out the next time I go to the local Starbucks whether or not the iPhone will connect to their WiFi or not.
Hope this is helpful to folks.
)We recently upgraded to the new FiOS router (G3100). I had heard all sorts of rumors that you had to set up static IP addresses in order to make wireless printers work. That was very true and I finally figured things out yesterday.
Relevant to this forum, iOS 14 hit both of our phones this week. All of a sudden we were getting pop-up windows stating we weren't connected to the internet. Worse yet, Facetime no longer worked on WiFi but worked fine on cellular. On WiFi, we had the same symptoms that another poster experienced in reverse. I did hard & soft reboots and reset network connections a couple of times with no effect.
To make a long story short, I also had to set up static IP addresses for our iPhones. You'll need to be logged on to the router admin page on a laptop or desktop in order to find the IP address that the router has assigned to the iPhone. Then, you can go into the WiFi network setting on your iPhone and manually enter the same address. You'll also need the subnet address which is usually something like 255.255.255.0. Everything on the phone, including Facetime, works fine now. I'll find out the next time I go to the local Starbucks whether or not the iPhone will connect to their WiFi or not.
Hope this is helpful to folks.