This process sounds a little strange but this can sometimes solve this annoying authentication failed error message. Don’t forget about the airplane mode though because if it remains on then your phone won’t receive calls or allow mobile data when you want to use it. Once the Wi-Fi connects turn airplane mode off. Manually turn off the Wi-Fi and mobile data on your device, and then turn ON the airplane mode, while airplane mode is still active turn the Wi-Fi back on and then try to connect to the network again. If this is the situation that you find yourself in, then try the following… I have seen however where the correct password and Wi-Fi information does not work and the device keeps displaying an Authentication failed error message. So quadruple check the password one more time just for good measure and make sure that it is 100% correct in every way. Following the first step in this article and triple checking the password can usually help to resolve authentication failed errors and allow you to get back on track and connected to your network once again. It tries to verify/authenticate the password that you are using to log into your router/network and if the password is wrong then it fails to authenticate and will show an Authentication failed error message. Authentication issues are often (not always) a problem with the password.
