diff --git a/docs/en/SMS-Sending.md b/docs/en/SMS-Sending.md
index 75069aacbe..99d06fa903 100644
--- a/docs/en/SMS-Sending.md
+++ b/docs/en/SMS-Sending.md
@@ -1,3 +1,111 @@
-# Emailing
+# SMS Sending
 
-TODO!
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+The ABP Framework provides an abstraction to sending SMS. Having such an abstraction has some benefits;
+
+- You can then **easily change** your SMS sender without changing your application code.
+- If you want to create **reusable application modules**, you don't need to make assumption about how the SMS are sent.
+
+## Installation
+
+It is suggested to use the [ABP CLI](CLI.md) to install this package.
+
+### Using the ABP CLI
+
+Open a command line window in the folder of the project (.csproj file) and type the following command:
+
+```bash
+abp add-package Volo.Abp.Sms
+```
+
+### Manual Installation
+
+If you want to manually install;
+
+1. Add the [Volo.Abp.Sms](https://www.nuget.org/packages/Volo.Abp.Sms) NuGet package to your project:
+
+```
+Install-Package Volo.Abp.Sms
+```
+
+2. Add the `AbpSmsModule` to the dependency list of your module:
+
+```csharp
+[DependsOn(
+    //...other dependencies
+    typeof(AbpSmsModule) //Add the new module dependency
+    )]
+public class YourModule : AbpModule
+{
+}
+```
+
+## Sending SMS
+
+[Inject](Dependency-Injection.md) the `ISmsSender` into any service and use the `SendAsync` method to send a SMS.
+
+**Example:**
+
+```csharp
+using System.Threading.Tasks;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Sms;
+
+namespace MyProject
+{
+    public class MyService : ITransientDependency
+    {
+        private readonly ISmsSender _smsSender;
+
+        public MyService(ISmsSender smsSender)
+        {
+            _smsSender = smsSender;
+        }
+
+        public async Task DoItAsync()
+        {
+            await _smsSender.SendAsync(
+                "+012345678901",        // target phone number
+                "This is test sms..."   // message text
+            );
+        }
+    }
+}
+```
+
+The given `SendAsync` method in the example is an extension method to send an SMS with primitive parameters. In addition, you can pass an `SmsMessage` object which has the following properties:
+
+- `PhoneNumber` (`string`): Target phone number
+- `Text` (`string`): Message text
+- `Properties` (`Dictionary<string, string>`): Key-value pairs to pass custom arguments
+
+## NullSmsSender
+
+`NullSmsSender` is a the default implementation of the `ISmsSender`. It writes SMS content to the [standard logler](Logging.md), rather than actually sending the SMS.
+
+This class can be useful especially in development time where you generally don't want to send real SMS. **However, if you want to actually send SMS, you should implement the `IsSmsSender` in your application code.**
+
+## Implementing the ISmsSender
+
+You can easily create your SMS sending implementation by creating a class that implements the `ISmsSender` interface, as shown below:
+
+```csharp
+using System.IO;
+using System.Threading.Tasks;
+using Volo.Abp.Sms;
+using Volo.Abp.DependencyInjection;
+
+namespace AbpDemo
+{
+    public class MyCustomSmsSender : ISmsSender, ITransientDependency
+    {
+        public async Task SendAsync(SmsMessage smsMessage)
+        {
+            // Send sms
+        }
+    }
+}
+```
+
+## More
+
+[ABP Commercial](https://commercial.abp.io/) provides Twilio integration package to send SMS over [Twilio service](https://docs.abp.io/en/commercial/latest/modules/twilio-sms).
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diff --git a/docs/en/docs-nav.json b/docs/en/docs-nav.json
index 32e62eccbe..5e0f0b469a 100644
--- a/docs/en/docs-nav.json
+++ b/docs/en/docs-nav.json
@@ -285,6 +285,10 @@
             }
           ]
         },
+        {
+          "text": "SMS Sending",
+          "path": "SMS-Sending.md"
+        },
         {
           "text": "Event Bus",
           "items": [