目录摘要..................................................................................................................................................3关键字..............................................................................................................................................3引言..................................................................................................................................................4一、背景简介..........................................................................................................................4二、研究意义..........................................................................................................................4第一章 3G 产品特性......................................................................................................................61.1 天翼 3G 介绍......................................................................................................................61.1.1 3G 上网版..............................................................................................................61.1.2 3G 聊天版..............................................................................................................71.1.3 联通 3G 业务.........................................................................................................71.1.4 无线网卡..............................................................................................................9第二章 3G 产品市场分析..........................................................................................................102.1 品牌关注格局..................................................................................................................102.1.1 前十五家品牌累计占据 93.0%的关注比例.......................................................102.1.2 五家国产品牌排名波动.................................................................................112.2 产品...