微软(Microsoft)已经发布了适用于Windows Phone 8.1智能手机的(Windows Phone 8.1)Windows 10 Mobile 升级(Mobile upgrade)，你们中的许多人，就像我们一样，渴望安装它，看看新操作系统(operating system)的外观和工作方式。但是，升级到Windows 10(Windows 10)移动版(Mobile)后，有些人可能不喜欢它，而另一些人的智能手机可能会出现问题。如果您遇到这种情况，您可能想回到Windows Phone 8.1。是的，这个操作系统陈旧而过时，但它也非常精致，优化得非常好，几乎没有错误，而对于(operating system)Windows 10 Mobile则不能这样说。幸运的是，微软(Microsoft) 允许用户将他们的智能手机恢复到Windows Phone 8.1。以下是该过程的工作原理：
步骤 1(Step 1)。在您的 PC 上安装Windows 设备恢复工具(Windows Device Recovery Tool)
为了恢复到Windows Phone 8.1，您必须使用来自Microsoft的名为(Microsoft)Windows Device Recovery Tool的工具。首先(Start)从其官方网站下载它，这里是：Windows Device Recovery Tool。
下载后，运行WindowsDeviceRecoveryToolInstaller.exe文件并在您的计算机上安装该工具。您被告知它需要首先安装一些先决条件，例如Windows Phone驱动程序。单击(Click)或点击安装(Install)，然后在显示的 UAC 提示中点击是。(Yes)
安装必备软件后，将显示Windows 设备恢复工具安装向导(Windows Device Recovery Tool Setup Wizard)。按下一步(Next)，然后接受许可协议。再次单击(Click)或点击Next，然后点击Install，继续安装。
安装完成后，单击或点击启动应用程序(Launch application)按钮以启动Windows 设备恢复工具(Windows Device Recovery Tool)。
步骤 2(Step 2)。准备您的Windows 10 移动版智能手机(Mobile smartphone)以回滚到Windows Phone 8.1
这是一个中间步骤，也是非常重要的一步。在继续回滚之前，请确保：
- 备份(Backup)升级后您可能在 Windows 10移动版智能手机上创建的所有个人文件。(Mobile smartphone)我们正在考虑您拍摄的照片、录制的视频、创建的文档等等。恢复到Windows Phone 8.1的过程将清除您设备上的所有内容。如果您不备份数据，则回滚完成后您将无法从中恢复任何内容。
- 将智能手机的电池至少充电至其容量的 50%。事实上，Microsoft建议您的设备尽可能充满电。
步骤 3(Step 3)。从Windows 10移动版(Mobile)回滚(Roll)到Windows Phone 8.1
启动Windows 设备恢复工具(Windows Device Recovery Tool)后，它要求的第一件事就是将智能手机连接到 PC。使用合适的USB 电缆(USB cable)将Windows 10 移动版智能手机(Mobile smartphone)插入计算机。如果未自动检测到您的智能手机，请按“未检测到我的设备”("My device was not detected")按钮，然后重试。
当计算机检测到您的智能手机时，Windows 设备恢复工具(Windows Device Recovery Tool)会显示其型号。在我们的例子中，它是诺基亚 Lumia 930(Nokia Lumia 930)，如下图所示(image below)。单击(Click)或点击智能手机的名称以将其选中。
Windows 设备恢复工具(Windows Device Recovery Tool)需要几秒钟来从您的智能手机读取固件和软件信息(firmware and software information)。在此期间，请勿断开电缆与 PC 的连接。
Windows 设备恢复工具(Windows Device Recovery Tool)现在检查“服务器上可用的软件”("Software available on server")，并通知您“您的设备有更新”("There is an update for your device ")或“您拥有最新的可用软件版本”("You have the latest available software version")。您很可能会看到设备上可用的操作系统版本(operating system version)与服务器上的不同。例如，在下面的屏幕截图中，服务器上可用的版本是 9651.14219（意思是Windows Phone 8.1），而智能手机上可用的版本是 10586.13080（意思是Windows 10 Mobile）。
要重新安装Windows Phone 8.1，请单击或点击安装软件(Install software)按钮。对于某些智能手机，该按钮名为“重新安装软件”("Reinstall software ")。单击或点击它。
Windows 设备恢复工具(Windows Device Recovery Tool)会通知您，智能手机上的所有个人内容都将在安装过程中被删除。如果您已经按照我们的建议备份了您的个人文件，那么您应该没问题。继续(OK. Go)并单击或点击继续(Continue)。如果您没有备份数据，这是您将收到的最后一个警告，因此请立即执行备份。
Windows 设备恢复工具(Windows Device Recovery Tool)开始下载Windows Phone 8.1安装文件。它们占用大约 1.71 GB 的存储空间(storage space)。
下载完成后，Windows Device Recovery Tool会让您知道您的智能手机将切换到闪烁模式，这意味着它将重新启动并开始安装Windows Phone 8.1 操作系统(operating system)。
这一步和接下来的几个步骤是必不可少的，不应被任何东西打断：不要断开智能手机与计算机的连接，在安装完成之前不要触摸任何东西！
一旦您的智能手机进入闪烁模式(flashing mode)，Windows Phone 8.1安装就会开始。Windows 设备恢复工具(Windows Device Recovery Tool)可让您随时了解安装进度，如下图所示(image below)。
如果您在安装过程中(installation process)查看您的智能手机，您会看到它的屏幕显示一个基本的进度条，仅此而已(progress bar and nothing)。不要惊慌，这很正常！
安装过程(installation process)完成后，Windows 设备恢复工具(Windows Device Recovery Tool)会让您了解它。单击(Click)或点击完成(Finish)以关闭应用程序。
智能手机现已结束回滚过程(rollback process)。它会重新启动，您可以返回使用Windows Phone 8.1。
结论
(Windows 10) 对于拥有在Windows Phone 8.1(Windows Phone 8.1)上运行的智能手机的许多人来说，Windows 10移动版(Mobile)是新的和令人兴奋的。但是，即使现在可以升级到Windows 10移动版(Mobile)，您也可能会发现您不喜欢它，或者您有一些无法解决的问题。如果您遇到这种情况，那么现在您知道如何将智能手机从Windows 10 (Windows 10)Mobile回滚到Windows Phone 8.1，这样您就不会再为新的操作系统(operating system)感到沮丧了。你(Did)试过这个程序吗？它奏效了吗？(Did)您对Windows 10移动版(Mobile)有何看法？
How to roll back your smartphone from Windows 10 Mobile to Windows Phone 8.1
Mіcrosoft has released the Windows 10 Mobile upgrade for Windows Phone 8.1 smartphones and many of you, just like uѕ, were eager to install it and see how the new operating system looks and works. However, some people may not like it while others may have issues with their smartphones, after the upgrade to Windows 10 Mobile. If that is the caѕe for you, yоu might want to go back to Windows Phone 8.1. Yes, this operating system is old and dated but it is also very polished, very well optimized and almost bug-freе, while the same cаnnot be said about Windows 10 Mobile. Fortunatelу, Microsoft allows users to revert their smartphones back to Windows Phone 8.1. Here's how the рrocess works:
Step 1. Install the Windows Device Recovery Tool on your PC
In order to revert to Windows Phone 8.1, you have to use a tool called Windows Device Recovery Tool from Microsoft. Start by downloading it from its official website, here: Windows Device Recovery Tool.
Once you downloaded, run the WindowsDeviceRecoveryToolInstaller.exe file and install the tool on your computer. You are informed that it needs to first install some prerequisites like Windows Phone drivers. Click or tap Install and then Yes in the UAC prompt that is shown.
After the prerequisites are installed, the Windows Device Recovery Tool Setup Wizard is shown. Press Next and then accept the license agreement. Click or tap Next one more time, followed by Install , to go ahead with the installation.
When the installation is done, click or tap the Launch application button to start the Windows Device Recovery Tool.
Step 2. Prepare your Windows 10 Mobile smartphone for rolling back to Windows Phone 8.1
This is an intermediary step and a very important one. Before you go ahead with the rollback, make sure that you:
- Backup any personal files that you might have created on your Windows 10 Mobile smartphone after the upgrade. We are thinking about the pictures you took, the videos you recorded, the documents you created and so on. The process of reverting to Windows Phone 8.1 will erase everything on your device. If you don't backup your data, you won't be able to recover anything from it after the rollback is done.
- Charge your smartphone's battery to at least 50% of its capacity. In fact, Microsoft recommends that your device is fully charged if possible.
Step 3. Roll back to Windows Phone 8.1 from Windows 10 Mobile
Once you launch the Windows Device Recovery Tool , the first thing it asks is to connect your smartphone to the PC. Use an appropriate USB cable to plug your Windows 10 Mobile smartphone into your computer. If your smartphone is not automatically detected, press the "My device was not detected" button and try again.
When the computer detects your smartphone, the Windows Device Recovery Tool shows its model. In our case, it's a Nokia Lumia 930, as you can see in the image below. Click or tap the smartphone's name to select it.
Windows Device Recovery Tool needs a few seconds to read the firmware and software information from your smartphone. During this time, do not disconnect the cable from your PC.
Windows Device Recovery Tool now checks the "Software available on server" and notifies you whether "There is an update for your device " or "You have the latest available software version". Most probably, you will see that the operating system version available on your device is different than that on the server. For example, in the screenshot below, the version available on the server is 9651.14219 (meaning Windows Phone 8.1) while the version available on the smartphone is 10586.13080 (meaning Windows 10 Mobile).
To reinstall Windows Phone 8.1, click or tap the Install software button. For some smartphones, the button is named "Reinstall software ". Click or tap on it.
Windows Device Recovery Tool notifies you that all the personal content on your smartphone will be erased during the installation. If you already backed up your personal files as we recommended, you should be OK. Go ahead and click or tap Continue. If you didn't backup your data, this is the last warning you will get, so please perform the backup now.
Windows Device Recovery Tool starts to download the Windows Phone 8.1 installation files. They take about 1.71 GB of storage space.
When the download is finished, Windows Device Recovery Tool lets you know that your smartphone will switch to flashing mode, which means that it will reboot and begin installing the Windows Phone 8.1 operating system.
This and the next few steps are essential and shouldn't be interrupted by anything: don't disconnect the smartphone from your computer, don't touch anything until the installation is done!
Once your smartphone enters the flashing mode, the Windows Phone 8.1 installation starts. The Windows Device Recovery Tool keeps you posted with the progress of the installation, as you can see in the image below.
If you look at your smartphone during the installation process, you see that its screen displays a basic progress bar and nothing more. Don't panic, this is normal!
When the installation process is complete, Windows Device Recovery Tool lets you know about it. Click or tap Finish to close the app.
The smartphone has now ended the rollback process. It reboots and you can go back to using Windows Phone 8.1.
Conclusion
Windows 10 Mobile is new and exciting for many people who own smartphones running on Windows Phone 8.1. However, even if the upgrade to Windows 10 Mobile is now available, you might find that you don't like it or that you have some issues that you just can't fix. If that's the case for you, now you know how to roll back your smartphone from Windows 10 Mobile to Windows Phone 8.1, so that you are no longer frustrated by the new operating system. Did you try this procedure? Did it work? What is your opinion about Windows 10 Mobile?
