wifi password always say incorrect password

If you rebooted your router, forgot the network on your phone and Reset Network Settings (ALL THREE STEPS) and it didn't fix the problem next try the router settings for MAC filtering (called Access Control on some routers). This feature of routers blocks access to any devices not listed on its "Allowed" list. and the message to a blocked device would be "incorrect password".

Also see if it connects when you are right next to an access point for your router.

Do a full backup and restore using your Mac or PC. If still problems go to a repair shop

A lot of WiFi networks are marked Wifi Protected Access, meaning that they require a password in order for users to be able to connect to the network.

In your case, the WiFi password could be incorrect if you made a typographical error or simply don't have the correct password. Without entering the correct WiFi password, you won't be able to access the network.

shfat wrote:

Other device working properly

Have you rebooted your router?

Does your phone work on other networks?

Try these in sequence

In wifi settings tap the (i) to the right of the wifi in question and tap Forget this network.

If it's your wifi hard reset the router

In Settings, General, Reset, Reset network settings

Have you tried sharing your password from another device?

See How to share your Wi-Fi password from your iPhone, iPad, or iPod touch