Our phones will not stay on wifi after the update to 15.2.1. I have reset the network and it keeps saying incorrect wifi password on the iphone Xr. Iphone 11 the password works but will not stay connected. How do I fix it or how to I go back to the previous iOS?
iPhone 11, iOS 15
See the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT204051
Recommended settings for Wi-Fi routers and access points
https://support.apple.com/en-us/HT202068
If you need help with your Wi‑Fi password
https://support.apple.com/en-us/HT204070
See the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT204051
Recommended settings for Wi-Fi routers and access points
https://support.apple.com/en-us/HT202068
If you need help with your Wi‑Fi password
https://support.apple.com/en-us/HT204070
Wifi Connection issue after update to 15.2.1
