diff --git a/odoo-addons/skeen_whatsapp/controllers/frontend.py b/odoo-addons/skeen_whatsapp/controllers/frontend.py
index 4e68e05..24875af 100644
--- a/odoo-addons/skeen_whatsapp/controllers/frontend.py
+++ b/odoo-addons/skeen_whatsapp/controllers/frontend.py
@@ -94,7 +94,10 @@ class SkeenFrontendController(http.Controller):
             if not login or not password:
                 return json_response({'status': 'error', 'message': 'Usuario y contraseña son obligatorios'}, 400)
             User = request.env['skeen.frontend.user'].sudo()
-            user = User.search([('login', '=', login), ('active', '=', True)], limit=1)
+            # Login insensible a mayúsculas/minúsculas (la gente escribe "Andrea").
+            # =ilike trata % y _ como comodines: se quitan para buscar literal.
+            login_lookup = login.replace('%', '').replace('_', '')
+            user = User.search([('login', '=ilike', login_lookup), ('active', '=', True)], limit=1)
             if not user or not user.check_password(password):
                 return json_response({'status': 'error', 'message': 'Credenciales inválidas'}, 401)
             user.write({'last_login': fields.Datetime.now()})