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Unverified80% confidenceDecision RuleTime unknown

购买前须确认设备使用的网络制式：2G设备成本低但多地2G网络已退网将逐步失效，应选4G Cat-1或Cat-M/NB-IoT制式，NB-IoT功耗低适合长续航追踪场景

1

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80%

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Medium-term (~90 days)

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-

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Related Entities

急救定位追踪器category

Related Claims

Unverified选购前务必确认设备网络制式，2G定位器在多地已因2G退网无法使用，应选支持4G Cat.1或Cat.M（NB-IoT）的新款设备90% similar Unverified选购前必须确认设备支持的网络制式，2020年后需选支持4G Cat.1或NB-IoT的产品，2G/3G基站已大面积退网，老旧2G定位器可能直接失去信号88% similar Unverified选购前需确认设备使用的网络制式：2G设备正随运营商2G退网逐步无法使用，应选4G Cat.1或Cat.M制式设备以保证长期可用86% similar Unverified不要选仅支持2G网络的追踪器，多地已启动2G退网，设备会逐渐失去联网定位能力，应选4G Cat.1或以上制式84% similar Unverified只支持2G网络的GPS追踪器不建议购买，中国移动/联通2G网络已大面积退网，设备可能随时失联，应选支持4G Cat1或Cat M（NB-IoT）网络的型号82% similar

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