Fiime分享汉化： @奥奥
什么是引导加载程序(BL锁)？
解锁引导加载程序对于刷写第三方ROM，非常必要。如果你想安装一个自定义ROM或只是ROOT的小米手机，那么首先你需要解锁你的设备引导。
解锁引导加载程序的优点
安装定制ROM、Root和TWRP的可能性；
你可以安装不兼容的应用程序到您已ROOT手机；
降/超频您的手机CPU。
解锁引导加载程序的缺点
您的设备保修可能根据您的操作而失效；
设备性能可能受到正面或负面影响；
解锁引导加载程序后，所有数据和文件都将被擦除；
逐步解锁引导加载程序
启用USB调试和OEM解锁；
设置→ 附加设置→ 开发人员选项。（有关此选项，请转到设置。）→ 关于电话→ 然后轻触MIUI版本5-7次以启用开发人员选项）；
然后打开你的移动数据。请记住，您必须使用创建Mi帐户的同一SIM卡打开移动数据；
现在你必须点击Mi解锁状态。然后点击同意按钮；
之后，您必须点击“添加帐户和设备”；
然后，关闭手机电源并将其引导至Fastboot模式(同时按下音量降低和电源按钮几秒钟）；
进入Fastboot模式后，通过USB电缆将手机连接到PC/笔记本电脑。
将Mi解锁工具下载到电脑并解压缩(下载按钮）
已将文件夹解压缩到桌面，并打开“miflash_unlock.exe”
下次使用您的Mi帐户登录，该帐户已连接到您的手机。
然后单击“解锁”按钮。
根据您的Mi帐户，您的冷却时间至少为XXX小时
您需要等待该时间，然后重新执行此过程。之后，只需点击“解锁”，程序将开始，等待它完成(它将清除您的所有数据）
要确保在启动设备时解锁，请确保在启动屏幕顶部看到一个灰色的锁定图标。如果出现，则您已成功解锁它。
http://www.miui.com/unlock/
What is Bootloader?
Unlocking the bootloader is essential to customize any Smartphones. If you want to install a custom ROM or just Root your Smartphone then you need to unlock your device bootloader first.
Advantages of Unlock Bootloader
Possibility of installing a Custom ROM, Root and TWRP;
You can install Incompatible apps by Rooting your phone;
Underclock/Overclock your Phone CPU.
Disadvantages of Unlock Bootloader
Your Device warranty will get void depending where you bought it;
Device performance may be affected, positively or in a negatively way;
After unlocking the bootloader, all your data and files are Erased;
Unlock Bootloader Step-by-Step
Enable USB debugging and OEM Unlock;
Settings → Additional settings → Developer Options.(For this, go to Settings → About Phone → Then Tap MIUI version 5-7 times to enable Developer Options);
Then Turn on your mobile data. Keep in mind, you have to turn on mobile data from the same SIM from which you have created your Mi account;
Now you have to Tap on Mi Unlock status. And then tap on the Agree button;
After that, you have to tap on “Add Account and Device“;
Then, Power off your Phone and boot it into the Fastboot mode. (Press Volume Down and Power Button simultaneously for a couple of seconds);
Once you enter Fastboot mode, connect your Phone to a PC/Laptop via USB cable.
Download the Mi Unlock Tool to your PC and extract it. (DOWNLOAD Button)
Extracted the folder to your Desktop, and open “miflash_unlock.exe”
Next Sign in with your Mi Account, which was connected with your phone.
Then Click on the ”Unlock” Button.
You will have a cooldown of XXX hours minimum depending on your Mi Account
You need to wait that time and then do this procedure all over again. After that just click on “Unlock” and the procedure will start, wait for it to finish. (IT WILL CLEAN ALL OF YOUR DATA)
To make sure it’s unlocked when booting the device make sure you see a grey lock icon on top of the splash screen. If that appears then you successfully did unlock it.
https://en.miui.com/unlock/download_en.html
