iPhone 7 - cannot obtain IP address from home WIFI
Reset network settings on the iPhone


Go to Settings.
Tap General.
Scroll down to and tap on Reset.
Choose the option to Reset network settings.
If prompted, enter your passcode to proceed.
Then tap the option to confirm that you want to reset network settings on your iPhone.


When the reset is finished, your iPhone should restart on its own and then loads up the original network configurations. Don’t forget to reconnect to your Wi-Fi network to get back online and use online services.