（三）具有改变主叫号码、虚拟拨号、互联网电话违规接入公用电信网络等功能的设备、软件；
内存价格的波动周期已缩短至历史最短，甚至出现一个月内二次调价的极端情况。这种高频波动迫使手机厂商不得不采取动态定价策略。
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The supermarket giant said roles at its Welwyn Garden City headquarters in Hertfordshire were at risk under new proposals.