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Description: The sms modem is made of quectel modules. There are 2G/3G/4G model This is 3G model and supports 3G frequency all the world. Specificatio...
Time : Dec,04,2025
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1. Product Introduction The mobile phone control system establishes an integrated group management framework, enabling signal suppression, network blo...
Time : Dec,11,2025
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... the device warning and prompt messages to surrounding mobile phone users. The device supports to or to mobile phones users...
Time : Mar,21,2025
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