Again Wi-Fi issues are started to occur in iPhone after the update has come, as I personally encountered in my iPhone X. the report of users have common issues like iPhone keeps saying that incorrect password or they are getting the unknown error while connecting to Wi-Fi or “Failed To Join WiFi Name”. But when they switch to their cellular data it is working perfectly.
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Incorrect password while login apple ID: Try after Change WiFi or Use Cellular data, too many wrong attempts may be disabled Apple ID all time.
Connect your iPhone to WiFi nearby network: Fix “incorrect password” popup
Fix 1: Force Restart
A hard restart is the primary step to fix any small bug and we always try this before anything. It will reboot the system and maybe your bug will get fixed.
Step 1: Press and release the volume up key.
Step 2: Press and release the volume down key.
Step 3: Now, hold the power button at least for some time until you see Apple logo.
Fix 2: Disable/ Enable Wi-Fi Networking Services
I know it is the weird solution but I have tried this one and also some of the users have mentioned in the forum that it is working.
Step 1: Go to “Settings” and open “Privacy”.
Step 2: Click on “Location & Services”.
Step 3: Now, tap on “System Services”.
Step 4: There turn off the Wi-Fi networking services.
Fix 3: Forgot Wi-Fi network
Those who are getting unknown errors like incorrect password in spite of correct password. They should try this one. Forget the Wi-Fi network and rejoin the network by entering the password.
Step 1: In the Settings, open Wi-Fi.
Step 2: Choose your network and tap on the info icon.
Step 3: Now click on “Forget the Network”.
Now turn off the Wi-Fi and force close the window and again follow the same steps and re-join the network.
Fix 4: Set Custom DNS
Sometimes connectivity problems can arise by DNS server from your Internet Service Provider. So this can be solved by changing the DNS server to Google DNS.
Step 1: Go to “Settings” and open Wi-Fi.
Step 2: Tap on info icon of your Wi-Fi network.
Step 3: Scroll down and enter 22.214.171.124 or 126.96.36.199 in DNS field.
Fix 5: Reset Network Settings
Most of the connectivity problems can be easily resolved by resetting the network settings. Which will reset all your caches and DHCP Settings of iPhone to its default settings? And those who are saying iPhone keeps saying that incorrect password they must try this solution.
Step 1: Go to “Settings” and tap on “General”.
Step 2: Then click on “Reset”.
Step 3: Now, tap “Reset Network Settings”.
Fix 6: Restore iPhone to its factory settings
If none of the above tips work for you then restore the iPhone to its factory settings. But before resetting the iPhone to its factory settings you must take back up.
Step 1: Connect the iPhone to PC using lightning cable.
Step 2: Then select your iPhone and tap on “Summary”.
Step 3: On the main screen you will see Restore iPhone, click on it.
This process will erase all the media and data from iPhone and restore the latest version of iOS on your iPhone/iPad.
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Hope you fixed iPhone keeps saying “incorrect password”. That I fixed last time with my iPhone X running on iOS 11 or later.