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5G来了，需要更换SIM卡吗？

 4 years ago
source link: https://news.cnblogs.com/n/626961/
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‍‍‍‍‍‍‍‍2019年作为5G元年，随着中国5G牌照的发放，5G离我们的生活越来越近。众所周知，要想体验5G速度，换支持5G的手机是必须的。中兴5G手机随之而来的疑问是：之前从2G升到3G，联通用户需要换SIM卡，从3G到4G的时候，移动和电信用户也

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