diff --git a/addons/mail/static/src/js/services/mail_manager.js b/addons/mail/static/src/js/services/mail_manager.js
index 64e733abf43..6a2fe69581d 100644
--- a/addons/mail/static/src/js/services/mail_manager.js
+++ b/addons/mail/static/src/js/services/mail_manager.js
@@ -903,11 +903,6 @@ var MailManager =  AbstractService.extend({
                 args: [[channelID]],
             })
             .then(function (result) {
-                // Prevent to automatically open chat window when a new message
-                // is received on mobile.
-                if (config.device.isMobile) {
-                    options.silent = true;
-                }
                 return self._addChannel(result, options);
             });
     },
@@ -1235,11 +1230,6 @@ var MailManager =  AbstractService.extend({
         var proms = [];
         const options = {};
 
-        // Prevent to automatically open all chat windows at initial loading.
-        if (config.device.isMobile) {
-            options.silent = true;
-        }
-
         _.each(data.channel_slots, function (channels) {
             _.each(channels, function (channel) {
                 proms.push(self._addChannel(channel, options));
diff --git a/addons/mail/static/src/js/services/mail_window_manager.js b/addons/mail/static/src/js/services/mail_window_manager.js
index 57b7623e05a..9cbb77e529d 100644
--- a/addons/mail/static/src/js/services/mail_window_manager.js
+++ b/addons/mail/static/src/js/services/mail_window_manager.js
@@ -658,11 +658,13 @@ MailManager.include({
      */
     _onNewChannel: function (channel, proms) {
         if (channel.isDetached()) {
-            var prom = this.openThreadWindow(channel.getID(), {
-                keepFoldState: true,
-                passively: true,
-            });
-            proms.push(prom);
+            if (!config.device.isMobile) {
+                var prom = this.openThreadWindow(channel.getID(), {
+                    keepFoldState: true,
+                    passively: true,
+                });
+                proms.push(prom);
+            }
         } else {
             this._closeThreadWindow(channel.getID());
         }