diff --git a/app/api/mobile/entities/project_package.rb b/app/api/mobile/entities/project_package.rb
index 41d582c7..684913e7 100644
--- a/app/api/mobile/entities/project_package.rb
+++ b/app/api/mobile/entities/project_package.rb
@@ -20,6 +20,9 @@ module Mobile
       expose :contact_name, if: ->(package, opts){ opts[:user].id == package.creator_id || opts[:user].admin? || opts[:user].business?  }
       expose :contact_phone, if: ->(package, opts){ opts[:user].id == package.creator_id || opts[:user].admin? || opts[:user].business?  }
 
+      expose :updated_at do |package, _|
+        package.updated_at.try(:utc).try(:iso8601)
+      end
       expose :deadline_at do |package, _|
         package.deadline_at.try(:utc).try(:iso8601)
       end
diff --git a/app/services/project_packages/save_service.rb b/app/services/project_packages/save_service.rb
index cc58ec7d..d6abbca9 100644
--- a/app/services/project_packages/save_service.rb
+++ b/app/services/project_packages/save_service.rb
@@ -42,7 +42,8 @@ class ProjectPackages::SaveService
   private
 
   def need_check_code?
-    (package.new_record? && params[:contact_phone] != package.creator.phone) || package.contact_phone != params[:contact_phone]
+    (package.new_record? && params[:contact_phone] != package.creator.phone) ||
+      (!package.new_record? && package.contact_phone != params[:contact_phone])
   end
 
   def check_code_valid!