Introduction
NOTE: Android is highly customizable and may look different depending on your manufacturer. The steps below may vary for different devices.
Instructions
1) Open the Settings app.
2) Tap Network & internet.
3) Tap Internet.
4) Tap the network for which you wish to update the password.
5) In the top right-hand corner, tap the edit button (pencil icon).
5) Type the new password. Then, tap Save.
NOTE: This screen may vary depending on whether you are connected to a network using WPA2 or WPA2-Enterprise.
Outcome
Your Android device is connected to the Wi-Fi network using the updated password.