I know its frustrating when your phones do not get connected to Wi-Fi... you can follow these steps:
1. Try restarting your phone, it helps in most cases.
2. Check your spellings in password might be small/capital letter.
3. Try getting near the Wi-Fi, sometimes its bandth of the wi-fi signal.
4. Also try restarting your Wi-Fi.
Please reply if these steps do not works... If it does, it was nice helping ya! :wink: