This is a mobile phone user manual, which mainly introduces the safety precautions, precautions, key instructions, screen, backlight settings, technical parameters, installation of SIM cards and batteries, T-FLASH cards, network connection, battery charging, power on and off, and use of earphones. Input methods, dialing, volume adjustment, answering calls, options during calls, internet, phone book, call records, scenario modes, messages, electronic secretaries, quick functions, multimedia, games, additional functions, file management, settings, and appendices.