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最早的时候,运营商宣传都是在说:不换卡不换号,升级5G。但是现在网上有一种说法是必须换卡才能上5G,其实也是一种误读。使用5G手机并不需要换卡,三大运营商都已经进行了声明。所谓的SA 5G增强卡,更多的会被应用在物联网场景。5G手机是可以不换卡的。5G是3GPP的5G标准,是在3GPP框架之内的。就3GPP的相关移动通信制式,其实手机卡都是可以沿用的,从3G的WCDMA,4G的LTE到5G的NR,都可以使用同样的USIM卡。 3G里的另外的两个标准,其实最初的时候TD-SCDMA也是需要换成USIM卡的,不过后来中国移动对鉴权进行了删减,所以才可以延续以前的SIM卡,而最早也有一部分TD-SCDMA用户是更换了USIM卡的。3G里的CDMA 2000 1x EVDO标准,是以高通为首的3GPP2为首的,它是沿用的2G得UIM卡或者是R-UIM卡,和3GPP是两条路。到了4G时代,中国电信用户必须换卡才能升级4G,也就是统一到了USIM卡。5G用户更换套餐,可以体验更好的5G网速。就现在三大运营商的5G,用户如果选择5G套餐,按照不同的价位,可以体验500Mbps或者是1Gbps的网速,这比沿用最大300Mbps的4G套餐,网速会快一些。而且5G套餐有更高的优先级,如果基站负荷高的话,不管是在4G还是5G网络之中,网速都会比使用4G套餐的快一些。 5G增强卡,其实主要是给物联网设备使用的。中国电信发布了SA安全增强SIM卡,里边有了新的5G SIM卡,也让很多的媒体、自媒体误以为必须要换5G卡才能使用5G网络。 其实如果你们仔细的看这个白皮书,就可以知道这些关于安全性的增强,是一种增强,而不是必选项。而这种增强,比较有吸引力的其实是行业的用户,也就是5G里更多应用的物联网设备。对于物联网本身而言,5G安全增强还是非常有吸引力的。基于用户的困扰,三大运营商也都纷纷的做出了声明,指出了现在5G手机用户依然不需要换卡就可以升级5G套餐,使用5G网络,也针对这个必须要换卡才能接入5G网络的说法进行了辟谣。这里不得说的是,一些非专业的用户,对于一些行业发布的白皮书,是缺少读懂的能力的。而网上的一些自媒体其实也没有足够的能力去读懂行业文档,隔行如隔山还是存在的。总而言之,5G手机,可以在不更换手机卡的前提下,使用5G套餐,体验更好的5G网络。如果你对安全性有特别的要求的话,也可以去更换新的5G安全增强SIM卡,不过这种卡一般人是用不到的,主要会是在一些新的5G物联网设备上使用。注:本文转载自网络,不代表本平台立场,仅供读者参考,著作权属归原创者所有。我们分享此文出于传播更多资讯之目的。如有侵权,请在后台留言联系我们进行删除,谢谢
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