Asus Zenfone 2 Deluxe ZE551ML delete your Google & Gmail account

OS: Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow); ZenUI

CPU: Quad-core 2.3 GHz
-Quad-core 1.8 GHz
-Quad-core 2.5 GHz

Display: 5.5" inc

Camera: 13 MP, Single

Remove a Google account on Asus Zenfone 2 Deluxe ZE551ML

If you are going to sell the phone to another user, you must definitely remove the Google account from the phone, otherwise the new user will get access to your mail or other 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 you to sign in to your Google account (such as Gmail, Drive, Google Play or Calendar).
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?
Open the Settings section on your phone.
Select Accounts and backup.
Click Manage Accounts and delete your account.