1、点击进入“设置”。点击进入“通用”如下图:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a8014c086e061d958de5922e72f40ad162d9ca01?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、如果系统有新版本,后面会出现“1”的字样,说明系统可升级,找到“软件更新”,点击进入;没有则说明手机系统已是最新版,不需要升级。如下图:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/21a4462309f790523b10e32805f3d7ca7bcbd59d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、在wifi或流量打开的情况下,点击“下载并安装”,这期间最好手机电量充足或直接连接充电线。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/9358d109b3de9c82dced5d996581800a19d8431f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、点击“条款与条件”中右下角的“同意”,如下图:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/9d82d158ccbf6c8190de88feb53eb13533fa403e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、之后耐心等待更新下载和安装即可。这期间手机会重新启动,可能需要等待几分钟。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/267f9e2f07082838616f7b02b199a9014c08f142?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
由于新的iOS固件都比较的大,下载时间根据网络情况有所不同,且下载固件的期间一定要保证网络通畅。