diff --git a/admin/tool/mobile/classes/api.php b/admin/tool/mobile/classes/api.php
index c7f537d6e42df..a9dc790dbff84 100644
--- a/admin/tool/mobile/classes/api.php
+++ b/admin/tool/mobile/classes/api.php
@@ -61,6 +61,10 @@ class api {
     const QR_CODE_URL = 1;
     /** @var int QR code type login value */
     const QR_CODE_LOGIN = 2;
+    /** @var string Default Android app id */
+    const DEFAULT_ANDROID_APP_ID = 'com.moodle.moodlemobile';
+    /** @var string Default iOS app id */
+    const DEFAULT_IOS_APP_ID = '633359593';
 
     /**
      * Returns a list of Moodle plugins supporting the mobile app.
@@ -689,14 +693,17 @@ public static function get_subscription_information() : ?array {
             $credentials[] = ['type' => 'siteid', 'value' => $CFG->siteidentifier];
         }
         // Generate a hash key for validating that the request is coming from this site via WS.
-        $sitesubscriptionkey = json_encode(['validuntil' => time() + 10 * MINSECS, 'key' => complex_random_string(32)]);
+        $key = complex_random_string(32);
+        $sitesubscriptionkey = json_encode(['validuntil' => time() + 10 * MINSECS, 'key' => $key]);
         set_config('sitesubscriptionkey', $sitesubscriptionkey, 'tool_mobile');
-        $credentials[] = ['type' => 'sitesubscriptionkey', 'value' => $sitesubscriptionkey];
+        $credentials[] = ['type' => 'sitesubscriptionkey', 'value' => $key];
 
         // Parameters for the WebService returning site information.
+        $androidappid = empty($mobilesettings->androidappid) ? static::DEFAULT_ANDROID_APP_ID : $mobilesettings->androidappid;
+        $iosappid = empty($mobilesettings->iosappid) ? static::DEFAULT_IOS_APP_ID : $mobilesettings->iosappid;
         $fnparams = (object) [
             'siteurl' => $CFG->wwwroot,
-            'appids' => [$mobilesettings->androidappid, $mobilesettings->iosappid],
+            'appids' => [$androidappid, $iosappid],
             'credentials' => $credentials,
         ];
         // Prepare the arguments for a request to the AJAX nologin endpoint.
diff --git a/admin/tool/mobile/lang/en/tool_mobile.php b/admin/tool/mobile/lang/en/tool_mobile.php
index ae42c54f00b1d..3f270eab9b3e3 100644
--- a/admin/tool/mobile/lang/en/tool_mobile.php
+++ b/admin/tool/mobile/lang/en/tool_mobile.php
@@ -98,7 +98,7 @@
 $string['notificationsactivedevices'] = 'Active devices';
 $string['notificationsignorednotifications'] = 'Notifications not sent';
 $string['notificationslimitreached'] = 'The monthly active user devices limit has been exceeded. Notifications for some users will not be sent. It is recommended that you upgrade your app plan in the <a href="{$a}" target="_blank">Moodle Apps Portal</a>.';
-$string['notificationsmissingwarning'] = 'Moodle app notification statistics could not be retrieved. This is most likely because mobile notifications are not yet enabled on the site.';
+$string['notificationsmissingwarning'] = 'Moodle app notification statistics could not be retrieved. This is most likely because mobile notifications are not yet enabled on the site. You can enable them in Site Administration / Notifications / Mobile.';
 $string['notificationsnewdevices'] = 'New devices';
 $string['notificationsseemore'] = 'Note: Moodle app usage statistics are not calculated in real time. To access more detailed statistics, including data from previous months, please log in to the <a href="{$a}" target="_blank">Moodle Apps Portal</a>.';
 $string['notificationssentnotifications'] = 'Notifications sent';
diff --git a/admin/tool/mobile/settings.php b/admin/tool/mobile/settings.php
index 59e0128f24ab7..90de327e94095 100644
--- a/admin/tool/mobile/settings.php
+++ b/admin/tool/mobile/settings.php
@@ -124,10 +124,10 @@
                     new lang_string('enablesmartappbanners_desc', 'tool_mobile'), 0));
 
         $temp->add(new admin_setting_configtext('tool_mobile/iosappid', new lang_string('iosappid', 'tool_mobile'),
-                    new lang_string('iosappid_desc', 'tool_mobile'), '633359593', PARAM_ALPHANUM));
+                    new lang_string('iosappid_desc', 'tool_mobile'), tool_mobile\api::DEFAULT_IOS_APP_ID, PARAM_ALPHANUM));
 
         $temp->add(new admin_setting_configtext('tool_mobile/androidappid', new lang_string('androidappid', 'tool_mobile'),
-                    new lang_string('androidappid_desc', 'tool_mobile'), 'com.moodle.moodlemobile', PARAM_NOTAGS));
+                    new lang_string('androidappid_desc', 'tool_mobile'), tool_mobile\api::DEFAULT_ANDROID_APP_ID, PARAM_NOTAGS));
 
         $temp->add(new admin_setting_configtext('tool_mobile/setuplink', new lang_string('setuplink', 'tool_mobile'),
             new lang_string('setuplink_desc', 'tool_mobile'), 'https://download.moodle.org/mobile', PARAM_URL));