HTC U Ultra delete your Google & Gmail account

OS: Android 7.0 (Nougat), upgradable to Android 8.0 (Oreo)

CPU: Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)

Display: 5.7" inc

Camera: 12 MP, Single

Remove a Google account on HTC U Ultra

You need to remove your Google account from your phone if you give the phone to another person and do not want him to get access to your profile settings, your mail or other Google services.

What happens after deleting a Google account?
Emails, all data and content, including files and photos, will be deleted.
The phone user will not be able to access Google services that require an 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 app.
After that, select the menu item Accounts and backup.
Select Manage accounts to get a list of accounts on your device.