This document is a simplified Chinese manual for the 414 mobile phone. It introduces the various components and functions of the phone, such as optical sensors, earpieces, displays, center keys, cursor keys, etc. It also explains how to operate the phone, such as making and receiving calls, saving and viewing phonebook entries, using the camera, etc. In addition, the document provides instructions for other phone features, such as setting the silent mode, voice memo, etc. For inquiries, please contact the au customer service center.