由于过多的使用数据服务，各种品牌各种型号的手机在AT&T又老又慢的EDGE网络中常常被拒绝服务，或者完全关闭其蜂窝网络。
With so much data usage, phones of all varieties are frequently forced back to AT&T’s older and slower EDGE network, or are forced off the cellular network altogether.
它或许通过最近的蜂窝塔或者是Wifi热点来测量你所在的位置。
It may instead be using "cell tower triangulation" to measure your distance from the nearest cellular network towers, or even doing a lookup from a database that maps wifi hotspots to GPS coordinates.
它的通讯系统可能会使用无线网络（Wi-Fi）技术，蜂窝式网络（cellular network），或者卫星通信技术。
The communications system may use Wi-Fitechnologies, a cellular network, or satellite communications.
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