diff --git a/app/services/contacts/filter_service.rb b/app/services/contacts/filter_service.rb
index 7f2d6a0b8..9d017ea75 100644
--- a/app/services/contacts/filter_service.rb
+++ b/app/services/contacts/filter_service.rb
@@ -21,7 +21,7 @@ class Contacts::FilterService < FilterService
   def filter_values(query_hash)
     current_val = query_hash['values'][0]
     if query_hash['attribute_key'] == 'phone_number'
-      "+#{current_val}"
+      "+#{current_val&.delete('+')}"
     elsif query_hash['attribute_key'] == 'country_code'
       current_val.downcase
     else
diff --git a/spec/services/contacts/filter_service_spec.rb b/spec/services/contacts/filter_service_spec.rb
index 22882ae81..77d3a49f3 100644
--- a/spec/services/contacts/filter_service_spec.rb
+++ b/spec/services/contacts/filter_service_spec.rb
@@ -9,7 +9,7 @@ describe Contacts::FilterService do
   let!(:inbox) { create(:inbox, account: account, enable_auto_assignment: false) }
   let!(:en_contact) { create(:contact, account: account, additional_attributes: { 'country_code': 'uk' }) }
   let!(:el_contact) { create(:contact, account: account, additional_attributes: { 'country_code': 'gr' }) }
-  let!(:cs_contact) { create(:contact, account: account, additional_attributes: { 'country_code': 'cz' }) }
+  let!(:cs_contact) { create(:contact, :with_phone_number, account: account, additional_attributes: { 'country_code': 'cz' }) }
 
   before do
     create(:inbox_member, user: first_user, inbox: inbox)
@@ -65,6 +65,42 @@ describe Contacts::FilterService do
       end
     end
 
+    context 'with standard attributes - phone' do
+      it 'filter contacts by name' do
+        params[:payload] = [
+          {
+            attribute_key: 'phone_number',
+            filter_operator: 'equal_to',
+            values: [cs_contact.phone_number],
+            query_operator: nil
+          }.with_indifferent_access
+        ]
+
+        result = filter_service.new(account, first_user, params).perform
+        expect(result[:count]).to be 1
+        expect(result[:contacts].length).to be 1
+        expect(result[:contacts].first.name).to eq(cs_contact.name)
+      end
+    end
+
+    context 'with standard attributes - phone (without +)' do
+      it 'filter contacts by name' do
+        params[:payload] = [
+          {
+            attribute_key: 'phone_number',
+            filter_operator: 'equal_to',
+            values: [cs_contact.phone_number[1..]],
+            query_operator: nil
+          }.with_indifferent_access
+        ]
+
+        result = filter_service.new(account, first_user, params).perform
+        expect(result[:count]).to be 1
+        expect(result[:contacts].length).to be 1
+        expect(result[:contacts].first.name).to eq(cs_contact.name)
+      end
+    end
+
     context 'with standard attributes - blocked' do
       it 'filter contacts by blocked' do
         blocked_contact = create(:contact, account: account, blocked: true)