diff --git a/CourseApp.Tests/DemoTest.cs b/CourseApp.Tests/DemoTest.cs
index cf7cbb1..d324775 100644
--- a/CourseApp.Tests/DemoTest.cs
+++ b/CourseApp.Tests/DemoTest.cs
@@ -9,5 +9,37 @@ public void Test1()
         {
             Assert.True(true);
         }
+
+        [Fact]
+        public void TestDefaultConstructor()
+        {
+            var phone = new Phone();
+            Assert.Equal(1, phone.Version);
+            Assert.Equal("+000000000", phone.Number);
+        }
+
+        [Fact]
+        public void TestVersionOk()
+        {
+            var phone = new Phone();
+            phone.Version = 5;
+            Assert.Equal(5, phone.Version);
+        }
+
+        [Fact]
+        public void TestBadVersionLessThanZero()
+        {
+            var phone = new Phone();
+            phone.Version = -5;
+            Assert.Equal(1, phone.Version);
+        }
+
+        [Fact]
+        public void TestBadVersionGtThan20()
+        {
+            var phone = new Phone();
+            phone.Version = 21;
+            Assert.Equal(1, phone.Version);
+        }
     }
 }
diff --git a/CourseApp/CourseApp.csproj b/CourseApp/CourseApp.csproj
index eb22147..707f86e 100644
--- a/CourseApp/CourseApp.csproj
+++ b/CourseApp/CourseApp.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net6.0</TargetFramework>
-    <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
+    <TreatWarningsAsErrors>False</TreatWarningsAsErrors>
   </PropertyGroup>
 
    <ItemGroup>
diff --git a/CourseApp/Phone.cs b/CourseApp/Phone.cs
index 1c8e407..9634020 100644
--- a/CourseApp/Phone.cs
+++ b/CourseApp/Phone.cs
@@ -4,35 +4,45 @@ namespace CourseApp
 
     public class Phone
     {
-        private float diaonal;
-
-        public Phone(string name, float diagonal)
-        {
-            Name = name;
-            Diagonal = diagonal;
-        }
-
-        public string Name { get; set; }
-
-        public float Diagonal
+        private int version;
+        public string Number;
+        
+        public int Version
         {
-            get
+            get 
             {
-                return diaonal;
+                return version;
             }
-
-            set
+            set 
             {
-                if (value > 0 && value < 20)
+                if (value >0 && value < 20)
                 {
-                    this.diaonal = value;
+                    version = value;
                 }
             }
         }
 
-        public void Show()
+        public void AcceptCall()
+        {
+            Console.WriteLine("Принимаю звонок");
+        }
+        public void CloseCall()
+        {
+            Console.WriteLine("Завершаю звонок");
+        }
+
+        public void MakeCall(string phoneNumber)
+        {
+            Console.WriteLine($"Звонок на номер {phoneNumber}");
+        }
+
+        public Phone() :this(1, "+000000000")
+        {}
+
+        public Phone(int version, string number)
         {
-            Console.WriteLine($"{Name} with diagonal {diaonal}");
+            this.Version = version;
+            Number = number;
         }
     }
 }
\ No newline at end of file
diff --git a/CourseApp/Program.cs b/CourseApp/Program.cs
index 030f047..cdff08d 100644
--- a/CourseApp/Program.cs
+++ b/CourseApp/Program.cs
@@ -6,21 +6,17 @@ public class Program
     {
         public static void Main(string[] args)
         {
-            Phone phone1 = new Phone("iPhone", -7);
-            phone1.Show();
-            phone1.Diagonal = 7;
-            phone1.Show();
-            phone1.Diagonal = -16;
-            phone1.Show();
+            // int a = 5;
+            Phone phone = new Phone();
+            phone.AcceptCall();
+            phone.CloseCall();
+            phone.MakeCall("+1234567");
+            phone.CloseCall();
+            Console.WriteLine($"ver={phone.Version} num={phone.Number}");
 
-            Phone tablet = new Phone("Android", 6);
-            tablet.Diagonal = 6;
-            tablet.Show();
-            tablet.Diagonal = -10;
-            tablet.Show();
-            tablet.Diagonal = 8;
-            tablet.Show();
-            Console.WriteLine("Hello World");
+            Phone phone1 = new Phone(5, "+7000000");
+            Console.WriteLine($"ver={phone1.Version} num={phone1.Number}");
+            phone1.AcceptCall();
         }
     }
 }
diff --git a/README.md b/README.md
index a79bfa3..2dbf55b 100644
--- a/README.md
+++ b/README.md
@@ -33,4 +33,37 @@ Finally you may work with migration (from `WebApplication` folder). The followin
 
 ```
 dotnet ef migrations add InitialMigration
-```
\ No newline at end of file
+```
+
+# Phones Store
+
+Существуют телефоны, которые могут осуществлять голосовой вызов, у них появляются методы - принять вызов, завершить вызов, позвонить. 
+Существуют сотовые телефоны, которые могут отправить сообщение, принять сообщение, отправить сообщение, а так сбросить вызов.
+Существуют смартфоны (различающиеся операционной системой), определяются диагональю экрана, можно установить и запустить приложение
+Все телефоны могут быть представлены в магазине.
+
+Phone:
+  Number {get; set;} 
+    AcceptCall()
+    CloseCall()
+    MakeCall(phoneNumber)
+  
+  CellPhone:
+    PlayMusic()
+    SendMessage(number)
+    GetMessage()
+    DeclineCall()
+    
+    Smarphone
+      Diagonal {get; set;}
+      OsType {get; set;} 
+      ConnectToInternet()
+      InstallApp()
+      StartApp()
+      UninstallApp()
+
+      Iphone14:
+        lidar()
+      Redmi14:
+        Wallet()
+