当您在浏览器的地址栏中输入网站名称时，它会被引用到DNS或域名系统^{(domain name system )}服务器，该服务器会将友好的 Web URL转换为指向特定服务器的 IP 地址。

您的服务提供商通常会运行自己的 DNS服务器，而您的路由器将默认使用此服务器。但是，您可以将该路由器或单个设备设置为使用您选择的DNS。这样做的原因有很多，但最重要的是，一个好的DNS服务器将：

• 提高页面加载速度
• 提供更好的隐私和安全性
• 删除当前 DNS 中可能存在的任何审查制度

在台式机和笔记本电脑上，我已经写过关于你可以使用的最好的公共 DNS 服务器和五个可以用来^{(best public DNS servers)}找到你附近最快的 DNS 服务器^{(find the fastest DNS server near you)}并自动为你更改的程序。

这一切都很好，但在 iOS 设备方面，Apple做出了一个相当奇怪的决定。虽然您可以为您连接的任何WiFi网络自由选择DNS，但您根本无法自定义您的移动网络DNS。幸运^(Luckily)的是，一位目光敏锐的应用程序开发人员提出了一种廉价的解决方案来解决这个问题。

DNS覆盖救援

有问题的应用程序是DNS Override。是的，您需要通过应用内购买支付少量费用才能获得此功能，但这是非常值得的。

要获得 DNS 覆盖，请从 App Store 下载。^{(download it from the App store.)}

下载应用程序并支付应用内DNS切换费用后，选择您选择的 DNS。^{(select the DNS of your choice.)}这里我们选择的是 Google 的公共 DNS^{(Public DNS)}服务，它通常比典型的默认DNS服务器快得多。[

确认DNS选择后，系统会提示您在设备上安装虚拟VPN配置文件。只需点击“安装 VPN 配置文件”^{(tap “Install VPN profile”)}。

不用担心，您实际上不会创建真正的VPN连接，并且您永远不应该尝试连接到这个虚拟VPN。这就是DNS Override欺骗 iOS 让您更改蜂窝连接的DNS设置的方式。

iOS 将提示您批准创建配置文件。只需^(Simply)点击允许^{( Allow)}继续。

如果一切顺利，您将看到此确认屏幕。

现在，当您连接到LTE/4G/5G时，您正在使用更高级、高性能的DNS服务器。差异应该立即显现出来。欢迎来到更加文明的互联网^(Internet)体验。

Use Custom DNS Servers on Cellular in iOS with DNS Override

When you type the name of a website into your browѕer’s address bar, it gets referred to a DNS or domain name system server, which translates the friendly web URL to an IP address pointing to a specific server.

Your service provider will usually run its own DNS server and your router will default to this. However, you can set that router or individual devices to use the DNS of your choice. There are many reasons to do this, but the bottom line is that a good DNS server will:

• Improve your page loading speeds
• Offer better privacy and security
• Remove any censorship that may be present in your current DNS

On desktop and laptop computers, I’ve already written about the best public DNS servers you can use and five programs you can use to find the fastest DNS server near you and have it changed for you automatically.

That’s all fine and dandy, but when it comes to iOS devices, Apple has made a rather odd decision. While you can freely choose your DNS for any WiFi network you connect to, you can’t customize your mobile network DNS at all. Luckily, one sharp-eyed app developer has produced a cheap solution to getting around this problem.

DNS Override to the Rescue

The app in question is DNS Override. Yes, you need to pay a small fee via in-app purchase to get this functionality, but it is well worth it.

To get DNS override, download it from the App store.

After downloading the app and paying the in-app fee for DNS switching, select the DNS of your choice. Here we are choosing Google’s Public DNS service, which is usually much faster than the typical default DNS server.[

Once you have confirmed the DNS selection, you’ll be prompted to install a dummy VPN profile on your device. Just tap “Install VPN profile”.

Don’t worry, you won’t actually be creating a real VPN connection and you should never try to connect to this dummy VPN. This is just how DNS Override fools iOS into letting you change the DNS settings for your cellular connection.

iOS will prompt you to approve the creation of the profile. Simply tap Allow to proceed.

If all goes well, you’ll see this confirmation screen.

Now you’re using a much more advanced, high-performance DNS server when you’re connected to LTE/4G/5G. The difference should be apparent immediately. Welcome to a much more civilized Internet experience.

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