If you perform a factory reset on the phone, do not change your Google Account password. Thank you to a new Google security feature added to new versions of Android, changing the correct password before resetting the device will result in an irreversible blockade for 72 hours on your device.
Quick steps to change google password on android device
Step 1 : Go to device : Select ‘ Settings’.
Step 2 : Choose ‘ Accounts’ under Settings.
Step 3: Under Accounts Select Google.
Step 4: Tap the Menu Icon ( denoted by three vertical dotted lines in the upper right hand corner...
Step 5 : Select Sync now.
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