diff --git a/lab2/main.rb b/lab2/main.rb
index 5b42be6..b426934 100644
--- a/lab2/main.rb
+++ b/lab2/main.rb
@@ -1,22 +1,27 @@
 require_relative 'student'
 
-student1 = Student.new(
-  surname: 'Алексеевич',
-  name: 'Артем-Дариус',
-  patronymic: 'Вебер',
-  id: 1,
-  phone: '+79891242223',
-  telegram: '@alstroemeria22',
-  email: 'no-replay@djft.ru',
-  git: 'https://git.djft.ru'
-)
+begin
+    student1 = Student.new(
+        surname: 'Алексеевич',
+        name: 'Артем-Дариус',
+        patronymic: 'Вебер',
+        id: 1,
+        phone: '+79891242223',
+        telegram: '@alstroemeria22',
+        email: 'no-replay@djft.ru',
+        git: 'https://git.djft.ru'
+    )
 
-student2 = Student.new(
-  surname: 'nil',
-  name: 'Норакет',
-  patronymic: 'nil'
-)
+    student2 = Student.new(
+        surname: 'nil',
+        name: 'Норакет',
+        patronymic: 'nil'
+    )
+
+    puts student1
+    puts '-' * 40
+    puts student2 
+rescue ArgumentError => e
+    puts "Err.: #{e.message}"
+end
 
-puts student1
-puts '-' * 40
-puts student2 
diff --git a/lab2/student.rb b/lab2/student.rb
index 0ba74f2..14f5464 100644
--- a/lab2/student.rb
+++ b/lab2/student.rb
@@ -1,14 +1,22 @@
 class Student
     attr_accessor :id, :surname, :name, :patronymic, :phone, :telegram, :email, :git
 
+    def self.valid_phone_number?(phone)
+        phone.match?(/\A\+?[0-9]{10,15}\z/)
+    end
+
     def initialize(args = {})
         @surname = args.fetch(:surname)
         @name = args.fetch(:name)
         @patronymic = args.fetch(:patronymic)
 
-
         @id = args[:id] || nil
-        @phone = args[:phone] || nil
+
+        @phone = args[:phone]
+        if @phone && !Student.valid_phone_number?(@phone)
+            raise ArgumentError, "Invalid phone number format: #{@phone}"
+        end
+        
         @telegram = args[:telegram] || nil
         @email = args[:email] || nil
         @git = args[:git] || nil