用无限流量卡长期开热点可以替换宽带，但会面临 3 个问题
用旧手机插无限流量卡长期开热点，究竟能不能替代家里的宽带？
用无限流量卡长期开热点可以替换宽带，但会面临3个问题
如今手机更新换代很快，家里不可能没几部旧手机，虽说是旧手机但也还能正常使用，卖不出价格，闲置着也怪可惜，于是就有机友突发奇想：能不能买张无限流量卡插在旧手机里面，长期开热点替代家里的宽带呢？
想法是挺美好的，但实际上需要面临以下几个问题：
流量有限制
无限流量卡一直是很多机友吐槽的对象，因为它不是真正的无限流量，而是有不少限制。比如无限流量卡中的4G流量是有上限的，有些套餐一般是一个月40G-100G，这个流量用完了以后，网络会被切换到低速网络3G甚至是2G，这时候如果想玩游戏或者看视频就会卡到怀疑人生。降速还是比较好的情况了，有些套餐甚至是超过一定限额之后直接断网，或规定超出部分另外收费，这就不是一般的坑。
信号不稳定
当手机有来电时，手机会处于断网状态，如果是用旧手机开热点倒是没有这个问题。不过相比宽带网络来说，手机开热点的稳定性没有保证，平时我们在外开热点给其他设备用，一般都是靠得比较近的使用所有没有察觉，但其实手机网络的信号会受到隔墙、电器等的影响，如果是在家里靠旧手机开热点来支持多台设备上网，那信号不好的毛病就会很明显了。
手机发热
手机长时间开热点，耗电会比较厉害，需要长时间充着电，加上开热点本身也会产生不少热量，而且一般退位下来的旧手机性能上多多少少已经不太给力，散热能力较差的话，手机长时间高温也会出现卡顿的情况，部分“年迈”的旧手机还可能直接就热关机了。
总结
旧手机用无线流量卡开热点代替宽带网络，如果是多人多台设备使用肯定就不建议了，如果只是自己或者1-2台设备使用，旧手机发热不是很严重，且流量消耗不算太多是可以考虑这样做的（单身狗又暴露无遗了），比较适合自己在某个地方暂住/经常搬家，短时间内不想安置宽带的机友。
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