diff --git a/base_phone/models/res_partner.py b/base_phone/models/res_partner.py
index 28b942b..7f451e2 100644
--- a/base_phone/models/res_partner.py
+++ b/base_phone/models/res_partner.py
@@ -1,10 +1,9 @@
-# -*- coding: utf-8 -*-
-# Copyright 2016-2018 Akretion France
+# Copyright 2016-2019 Akretion France (http://www.akretion.com/)
 # @author: Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 
-from odoo import models
+from odoo import api, models
 
 
 class ResPartner(models.Model):
@@ -28,3 +27,18 @@ class ResPartner(models.Model):
             return res
         else:
             return super(ResPartner, self).name_get()
+
+    # These 2 onchange have the same name (and same code) than in the
+    # module crm_phone_validation ; but we don't depend on that module
+    # because we don't want base_phone to depend on crm.
+    # When both base_phone AND crm_phone_validation are installed,
+    # as the methods have the same name, only one of the 2 will be executed
+    @api.onchange('phone', 'country_id', 'company_id')
+    def _onchange_phone_validation(self):
+        if self.phone:
+            self.phone = self.phone_format(self.phone)
+
+    @api.onchange('mobile', 'country_id', 'company_id')
+    def _onchange_mobile_validation(self):
+        if self.mobile:
+            self.mobile = self.phone_format(self.mobile)