美国蜂窝区移动通信几十年的发展似乎已走到了尽头。由于管理机制的变化、用户需求的提高、大量频段的分配以及众多新公司的出现等一连串因素的打击,蜂窝区移动电话行业原先稳定的两公司垄断的局面被打破了。虽然新用户人数不断增加,但是按发射时间的收费来看,行业收入出现了大 Decades of development of cellular cellular communications in the United States seem to have come to an end. The monopoly of the two companies, the former stable cellphone industry in the cellphone industry, was broken due to a series of factors such as the change of management mechanism, the increase of user demand, the distribution of a large number of frequency bands and the emergence of many new companies. Although the number of new users continue to increase, but according to the launch time of fees, the industry revenue appeared large