Samsung Galaxy Music Duos S6012 delete your Google & Gmail account

OS: Android 4.0.4 (Ice Cream Sandwich), upgradable to 4.1 (Jelly Bean)

CPU: 850 MHz Cortex-A9

Display: 3" inc

Camera: 3.15 MP, Single

Remove a Google account on Samsung Galaxy Music Duos S6012

If you bought yourself a new phone and are going to give the old one to your child, you need to remove your Google account from the phone so that the new user does not accidentally access your profile and disrupt Google services.

What happens after deleting a Google account?
All data and content associated with the account will be erased, including emails, files, calendars, and photos.
You won't be able to use Google services that require an account (such as Gmail, Drive, Calendar, or Google Play).
You will lose access to subscriptions and content purchased through this account on Google Play and YouTube (for example, applications, games, music, TV series).

How do I remove a Google account from my phone?
Go to the Settings section.
Select Accounts and backup.
Select Manage accounts and delete your account.