Open the Settings app
Tap General
Tap Transfer or Reset iPhone
Tap Reset
Tap Reset Network Settings
Enter your passcode if prompted
Confirm the reset
Wait for the iPhone to restart
Reconnect to Wi-Fi and re-enter network passwords
Open the Settings app
Tap General
Tap Transfer or Reset iPhone
Tap Reset
Tap Reset Network Settings
Enter your passcode if prompted
Confirm the reset
Wait for the iPhone to restart
Reconnect to Wi-Fi and re-enter network passwords