diff --git a/packages/session-replay-react-native/android/build.gradle b/packages/session-replay-react-native/android/build.gradle
index 02b727dbe..a57a73f87 100644
--- a/packages/session-replay-react-native/android/build.gradle
+++ b/packages/session-replay-react-native/android/build.gradle
@@ -96,7 +96,8 @@ repositories {
 def kotlin_version = getExtOrDefault("kotlinVersion")
 
 dependencies {
-  implementation("com.amplitude:session-replay-android:[0.24.0,0.25.0)")
+  // TODO(SDKRN-68): 0.29.0 is blocked on session-replay-android#471 merging and publishing to Maven Central.
+  implementation("com.amplitude:session-replay-android:[0.29.0,0.30.0)")
   implementation("com.amplitude:analytics-android:[1.25.0,1.26.0)")
 
   // For < 0.71, this will be from the local maven repo
diff --git a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
index 4172c50e7..93b22b44e 100644
--- a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
+++ b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
@@ -108,7 +108,7 @@ class SessionReplayReactNativeModule(private val reactContext: ReactApplicationC
   override fun setDeviceId(deviceId: String?, promise: Promise) {
     try {
       nativeConfig = requireNotNull(nativeConfig).copy(deviceId = deviceId)
-      sessionReplay?.setDeviceId(deviceId ?: "")
+      sessionReplay?.setDeviceId(deviceId)
       promise.resolve(null)
     } catch (e: Exception) {
       promise.reject("SET_DEVICE_ID_ERROR", e.message, e)
@@ -218,7 +218,7 @@ class SessionReplayReactNativeModule(private val reactContext: ReactApplicationC
     return SessionReplay(
       apiKey = config.apiKey,
       context = reactContext.applicationContext,
-      deviceId = config.deviceId ?: "",
+      deviceId = config.deviceId,
       sessionId = config.sessionId,
       optOut = config.optOut,
       sampleRate = config.sampleRate,
diff --git a/packages/session-replay-react-native/ios/AMPNativeSessionReplay.mm b/packages/session-replay-react-native/ios/AMPNativeSessionReplay.mm
index 2aec876b8..36406d56d 100644
--- a/packages/session-replay-react-native/ios/AMPNativeSessionReplay.mm
+++ b/packages/session-replay-react-native/ios/AMPNativeSessionReplay.mm
@@ -8,7 +8,7 @@ @interface RCT_EXTERN_MODULE(AMPNativeSessionReplay, NSObject)
 
 RCT_EXTERN_METHOD(setSessionId:(nonnull NSNumber)sessionId resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject)
 
-RCT_EXTERN_METHOD(setDeviceId:(NSString)deviceId resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject)
+RCT_EXTERN_METHOD(setDeviceId:(nullable NSString *)deviceId resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject)
 
 RCT_EXTERN_METHOD(setOptOut:(BOOL)optOut resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject)
 
diff --git a/packages/session-replay-react-native/ios/NativeSessionReplay.swift b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
index 2d924f757..a4fe06275 100644
--- a/packages/session-replay-react-native/ios/NativeSessionReplay.swift
+++ b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
@@ -71,7 +71,7 @@ class NativeSessionReplay: NSObject, RCTBridgeModule {
     }
     
     @objc(setDeviceId:resolve:reject:)
-    func setDeviceId(_ deviceId: NSString, resolve: RCTPromiseResolveBlock, reject: RCTPromiseRejectBlock) -> Void {
+    func setDeviceId(_ deviceId: NSString?, resolve: RCTPromiseResolveBlock, reject: RCTPromiseRejectBlock) -> Void {
         logger?.debug(message: "setDeviceId: \(deviceId)")
         sessionReplay?.deviceId = deviceId as String?
         resolve(nil)
diff --git a/packages/session-replay-react-native/test/session-replay.test.ts b/packages/session-replay-react-native/test/session-replay.test.ts
index 0cc9b3528..a69fa3df2 100644
--- a/packages/session-replay-react-native/test/session-replay.test.ts
+++ b/packages/session-replay-react-native/test/session-replay.test.ts
@@ -13,6 +13,8 @@ jest.mock('../src/logger', () => require('./utils/logger'));
 import { init, start, stop, getSessionId, teardown, setOptOut, type SessionReplayConfig } from '../src/index';
 import { NativeModules } from 'react-native';
 import { LogLevel } from '@amplitude/analytics-types';
+import { readFileSync } from 'fs';
+import { join } from 'path';
 
 const mockNativeModules = NativeModules as jest.Mocked<typeof NativeModules>;
 
@@ -110,6 +112,65 @@ describe('Session Replay Integration Tests', () => {
     expect(nativeModule.teardown).not.toHaveBeenCalled();
   });
 
+  describe('nullable device ID contract', () => {
+    it('forwards a null device ID during initialization', async () => {
+      let pending!: Promise<void>;
+      let setupMock!: jest.Mock;
+      jest.isolateModules(() => {
+        const { init: freshInit } = require('../src/index') as typeof import('../src/index');
+        const { NativeModules: freshNativeModules } = require('react-native') as typeof import('react-native');
+        setupMock = (freshNativeModules as jest.Mocked<typeof NativeModules>).AMPNativeSessionReplay.setup;
+        pending = freshInit({ apiKey: 'test-api-key', deviceId: null });
+      });
+
+      await pending;
+      expect(setupMock).toHaveBeenCalledWith(expect.objectContaining({ deviceId: null }));
+      expect(setupMock).not.toHaveBeenCalledWith(expect.objectContaining({ deviceId: '' }));
+    });
+
+    it('forwards null when clearing the device ID', async () => {
+      let pending!: Promise<void>;
+      let setDeviceIdMock!: jest.Mock;
+      jest.isolateModules(() => {
+        const { init: freshInit, setDeviceId: freshSetDeviceId } =
+          require('../src/index') as typeof import('../src/index');
+        const { NativeModules: freshNativeModules } = require('react-native') as typeof import('react-native');
+        setDeviceIdMock = (freshNativeModules as jest.Mocked<typeof NativeModules>).AMPNativeSessionReplay.setDeviceId;
+        pending = (async () => {
+          await freshInit({ apiKey: 'test-api-key' });
+          await freshSetDeviceId(null);
+        })();
+      });
+
+      await pending;
+      expect(setDeviceIdMock).toHaveBeenCalledWith(null);
+      expect(setDeviceIdMock).not.toHaveBeenCalledWith('');
+    });
+
+    it('keeps the Android bridge nullable without empty-string coercion', () => {
+      const source = readFileSync(
+        join(
+          __dirname,
+          '../android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt',
+        ),
+        'utf8',
+      );
+
+      expect(source).toContain('sessionReplay?.setDeviceId(deviceId)');
+      expect(source).toContain('deviceId = config.deviceId,');
+      expect(source).not.toContain('deviceId ?: ""');
+      expect(source).not.toContain('config.deviceId ?: ""');
+    });
+
+    it('declares the iOS setDeviceId bridge parameter nullable', () => {
+      const swiftSource = readFileSync(join(__dirname, '../ios/NativeSessionReplay.swift'), 'utf8');
+      const objcSource = readFileSync(join(__dirname, '../ios/AMPNativeSessionReplay.mm'), 'utf8');
+
+      expect(swiftSource).toContain('func setDeviceId(_ deviceId: NSString?');
+      expect(objcSource).toContain('setDeviceId:(nullable NSString *)deviceId');
+    });
+  });
+
   // These tests cover the resolution chain in `nativeConfig()` for the
   // deprecated top-level `maskLevel` field alongside `privacyConfig.maskLevel`.
   // `init()` keeps `isInitialized` in module scope, so each test uses