利用软件助手进行降级。
1、在电脑上下载爱思助手并打开。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/738b4710b912c8fc51fde8d6f0039245d688219a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、然后将ipad连接到电脑。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8cb1cb1349540923b7f07d659e58d109b3de490b?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、选择相应固件进行降级。如图选择将要降的系统级别。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a8ec8a13632762d00288baa4acec08fa513dc673?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
苹果自IOS7推出ID锁,禁止降级是为了防止有人偷盗通过降级的方法重新使用,这样可以有效降低iPhone和ipad被盗率。
降级都是需要联网经过苹果服务器验证才能降级。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0bd162d9f2d3572c61780c499813632763d0c389?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_450%2Ch_600%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
华为Mate50 Pro曲面旗舰手机
¥6799
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/54fbb2fb43166d22ceed8501542309f79152d289?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_450%2Ch_600%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
苹果 AirPods Pro 2代
¥1699
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/9922720e0cf3d7caf16cafe3e01fbe096a63a989?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_450%2Ch_600%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
索尼65英寸4K HDR专业游戏电视
¥7499
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/14ce36d3d539b6009e549f22fb50352ac75cb789?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_450%2Ch_600%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
惠普战66五代15.6英寸轻薄本
¥4399
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