wrong password wi-fi iPhone 6

Hi!

There are some times when I try to connect to a new Wi-Fi network that I receive a message from the system telling me that the password is wrong. And I know it's not wrong.

I've tried many of the common procedures, like turning off and on Wi-Fi, resetting network services (which is terrible because you lose all passwords), rebooting, refreshing. It's really annoying me. I see friends with Android and Windows OSs having no problem connecting to the very same network while my iPhone keep telling me "Wrong Password".

I have always the latest iOS version, and I try to have all my Apps and System FIles updated.

What's going on and what can I do to fix it?

Thank you!

Gustavo