diff --git a/src/api/config.ts b/src/api/config.ts
index 5a3841e..d544b17 100644
--- a/src/api/config.ts
+++ b/src/api/config.ts
@@ -4,6 +4,7 @@ import Http from '../http';
 import Logger from '../logger';
 import Session from '../session';
 import Navigator from '../navigator';
+import Storage from '../storage';
 
 import type { RadarTrackParams } from '../types';
 
@@ -16,12 +17,14 @@ class ConfigAPI {
       return;
     }
 
+    const id = Storage.getItem(Storage.ID) || undefined;
     const deviceId = params.deviceId || Device.getDeviceId();
     const installId = params.installId || Device.getInstallId();
     const sessionId = Session.getSessionId();
     const locationAuthorization = await Navigator.getPermissionStatus();
 
-    const data = {
+    const data: any = {
+      id,
       deviceId,
       installId,
       sessionId,
diff --git a/src/api/track.ts b/src/api/track.ts
index c653f6b..4970d6b 100644
--- a/src/api/track.ts
+++ b/src/api/track.ts
@@ -36,6 +36,7 @@ class TrackAPI {
     }
 
     // user indentification fields
+    const id = Storage.getItem(Storage.ID) || undefined; // `undefined` so it's removed from any fields
     const userId = params.userId || Storage.getItem(Storage.USER_ID);
     const deviceId = params.deviceId || Device.getDeviceId();
     const installId = params.installId || Device.getInstallId();
@@ -84,6 +85,7 @@ class TrackAPI {
       userId,
       tripOptions,
       timeZone,
+      id,
     };
 
     let response: any;
@@ -99,6 +101,7 @@ class TrackAPI {
         method: 'GET',
         path: 'config',
         data: {
+          id,
           deviceId,
           installId,
           sessionId,