Dead easy.
Touch Contacts.
Touch the contact you want to delete.
Touch the list icon at the bottom left of the screen.
Delete will show as the 3rd option. Touch that.
Touch OK.
OR, if you want to delete several contacts at a time
Touch Contacts
Touch the icon list at the bottom left of the screen.
Delete will be the 1st option.
Touch delete and then you can Select All or several individual contacts.
Then touch Delete at the top right of the screen.
Touch OK.
Ta Dah !!