Quick Tips for Wi-Fi Not Working on iPhone or iPad
'''1) Check your Wi-Fi Router'''
'''2) Make Sure Wi-Fi is on And You can See Your Network'''
'''3) Check All of Your Cables and Connections'''
'''4) Restart Your iPhone/iPad, Router, Cable/DSL mode'''
'''5) Reset Your Network'''
'''7) Reset Your Router'''
If your iPhone or iPad continues to have Wi-Fi problems, you can try to reset the router by turning it off for 30 seconds and then turning it on again.