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苹果手机系统怎么退级

更新时间: 2020-09-13 00:00:00     

苹果退级的方法和步骤:

1、在苹果手机上通过iTunes的本机备份,通过iCloud云服务来备份部分数据,或直连电脑来转移照片;

2、下载系统固件;

3、iPhone连上电脑,关闭iPhone,长按电源键加Home键亮机,屏幕会出现苹果logo,继续按至苹果logo消失后,再继续按两秒,接着松开电源键,继续只按Home键,之后iTunes上会显示苹果进入恢复模式,此时iPhone仍为为黑屏状态;

4、在iTunes里面,按键盘上Shift键加点选恢复iPhone,选择下载到的固件来恢复;

5、重新设置,恢复个人资料,退级完成。

关键词: 苹果 手机 系统 怎么

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