diff --git a/app/services/twilio/incoming_message_service.rb b/app/services/twilio/incoming_message_service.rb
index 02a1636ed..5f6704ff6 100644
--- a/app/services/twilio/incoming_message_service.rb
+++ b/app/services/twilio/incoming_message_service.rb
@@ -119,7 +119,7 @@ class Twilio::IncomingMessageService
     {
       name: contact_name,
       phone_number: phone_number.presence,
-      additional_attributes: additional_attributes
+      additional_attributes: additional_attributes, phone_number_candidates: twilio_whatsapp_phone_number_candidates
     }
   end
 
diff --git a/app/services/twilio/whatsapp_identifier_helper.rb b/app/services/twilio/whatsapp_identifier_helper.rb
index 731823903..37af346cb 100644
--- a/app/services/twilio/whatsapp_identifier_helper.rb
+++ b/app/services/twilio/whatsapp_identifier_helper.rb
@@ -41,6 +41,13 @@ module Twilio::WhatsappIdentifierHelper
     Whatsapp::PhoneNumberNormalizationService.new(inbox).normalize_and_find_contact_by_provider("whatsapp:#{phone_number}", :twilio)
   end
 
+  def twilio_whatsapp_phone_number_candidates
+    return unless twilio_channel.whatsapp? && phone_number.present?
+
+    candidates = Whatsapp::PhoneNumberNormalizationService.new(inbox).phone_number_candidates(phone_number.delete_prefix('+')).drop(1)
+    candidates.map { |candidate| "+#{candidate}" }.presence
+  end
+
   def twilio_whatsapp_source_id(identifier)
     identifier = identifier.to_s
     return if identifier.blank?
diff --git a/spec/services/twilio/incoming_message_service_spec.rb b/spec/services/twilio/incoming_message_service_spec.rb
index dc30f6e62..be7ed5ed2 100644
--- a/spec/services/twilio/incoming_message_service_spec.rb
+++ b/spec/services/twilio/incoming_message_service_spec.rb
@@ -670,6 +670,24 @@ describe Twilio::IncomingMessageService do
           expect(whatsapp_twilio_channel.inbox.contact_inboxes.first.source_id).to eq('whatsapp:+5541988887777')
         end
 
+        it 'reuses an existing contact in new format when the inbox has no contact inbox' do
+          existing_contact = create(:contact, account: account, phone_number: '+5541988887777')
+
+          params = {
+            SmsSid: 'SMxx',
+            From: 'whatsapp:+554188887777',
+            AccountSid: 'ACxxx',
+            MessagingServiceSid: whatsapp_twilio_channel.messaging_service_sid,
+            Body: 'Test message from Brazil',
+            ProfileName: 'João Silva'
+          }
+
+          expect { described_class.new(params: params).perform }.not_to change(account.contacts, :count)
+
+          contact_inbox = whatsapp_twilio_channel.inbox.contact_inboxes.find_by!(source_id: 'whatsapp:+554188887777')
+          expect(contact_inbox.contact).to eq(existing_contact)
+        end
+
         it 'creates contact inbox with incoming number when no existing contact' do
           params = {
             SmsSid: 'SMxx',