This document introduces the basic information of the Lenovo V858 mobile phone, including its appearance, button description, and status icons. It also includes pre-use instructions, such as battery installation, SIM card installation, and power on/off operations. In addition, it describes the basic functions of the phone, such as making phone calls, answering incoming calls, and making emergency calls. Finally, it includes instructions on using the phonebook, such as adding contacts, deleting contacts, and searching for contacts.