diff --git a/packages/celest/lib/src/auth/auth_provider.dart b/packages/celest/lib/src/auth/auth_provider.dart
index 39d60488..bf99d17f 100644
--- a/packages/celest/lib/src/auth/auth_provider.dart
+++ b/packages/celest/lib/src/auth/auth_provider.dart
@@ -3,14 +3,23 @@
 ///
 /// Currently, Celest supports the following authentication methods:
 /// - [AuthProvider.email] Email sign-in with OTP codes.
+/// - [AuthProvider.sms] SMS sign-in with OTP codes.
 /// {@endtemplate}
 sealed class AuthProvider {
+  /// {@macro celest.auth.auth_provider}
   const AuthProvider();
 
   /// A provider which enables email sign-in with OTP codes.
   const factory AuthProvider.email() = _EmailAuthProvider;
+
+  /// A provider which enables SMS sign-in with OTP codes.
+  const factory AuthProvider.sms() = _SmsAuthProvider;
 }
 
 final class _EmailAuthProvider extends AuthProvider {
   const _EmailAuthProvider();
 }
+
+final class _SmsAuthProvider extends AuthProvider {
+  const _SmsAuthProvider();
+}
diff --git a/packages/celest_auth/example/celest/auth.dart b/packages/celest_auth/example/celest/auth.dart
deleted file mode 100644
index ac57f6a8..00000000
--- a/packages/celest_auth/example/celest/auth.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-import 'package:celest/celest.dart';
-
-const auth = Auth(
-  providers: [
-    AuthProvider.email(),
-  ],
-);
diff --git a/packages/celest_auth/example/celest/client/lib/src/auth.dart b/packages/celest_auth/example/celest/client/lib/src/auth.dart
index 3685eeac..2237c787 100644
--- a/packages/celest_auth/example/celest/client/lib/src/auth.dart
+++ b/packages/celest_auth/example/celest/client/lib/src/auth.dart
@@ -19,4 +19,6 @@ extension type CelestAuth._(_$celest.AuthImpl _hub) implements _$celest.Auth {
         );
 
   _$celest.Email get email => _$celest.Email(_hub);
+
+  _$celest.Sms get sms => _$celest.Sms(_hub);
 }
diff --git a/packages/celest_auth/example/celest/project.dart b/packages/celest_auth/example/celest/project.dart
index d8835789..666172a2 100644
--- a/packages/celest_auth/example/celest/project.dart
+++ b/packages/celest_auth/example/celest/project.dart
@@ -3,3 +3,10 @@ import 'package:celest/celest.dart';
 const project = Project(
   name: 'celest_auth_example',
 );
+
+const auth = Auth(
+  providers: [
+    AuthProvider.email(),
+    AuthProvider.sms(),
+  ],
+);
diff --git a/packages/celest_auth/example/lib/main.dart b/packages/celest_auth/example/lib/main.dart
index 23c6c9ee..6c3cf526 100644
--- a/packages/celest_auth/example/lib/main.dart
+++ b/packages/celest_auth/example/lib/main.dart
@@ -15,13 +15,25 @@ class MainApp extends StatefulWidget {
 
 class _MainAppState extends State<MainApp> {
   final _emailController = TextEditingController();
+  final _phoneNumberController = TextEditingController();
   final _otpController = TextEditingController();
   Future<Object>? _request;
 
   Future<void> signUp() async {
     try {
-      await celest.auth.email.authenticate(email: _emailController.text);
+      await switch ((_emailController.text, _phoneNumberController.text)) {
+        (final email, _) when email.isNotEmpty =>
+          celest.auth.email.authenticate(
+            email: _emailController.text,
+          ),
+        (_, final phoneNumber) when phoneNumber.isNotEmpty =>
+          celest.auth.sms.authenticate(
+            phoneNumber: _phoneNumberController.text,
+          ),
+        _ => throw Exception('Email or phone number required'),
+      };
       _emailController.clear();
+      _phoneNumberController.clear();
     } on Exception catch (e, st) {
       debugPrint('Error: $e');
       debugPrint('Stacktrace: $st');
@@ -78,7 +90,7 @@ class _MainAppState extends State<MainApp> {
                     ],
                     const SizedBox(height: 16),
                     ...switch (state) {
-                      EmailNeedsVerification() => [
+                      OtpNeedsVerification() => [
                           TextField(
                             key: const ValueKey('otp'),
                             controller: _otpController,
@@ -111,9 +123,21 @@ class _MainAppState extends State<MainApp> {
                             keyboardType: TextInputType.emailAddress,
                           ),
                           const SizedBox(height: 16),
+                          TextField(
+                            key: const ValueKey('phoneNumber'),
+                            controller: _phoneNumberController,
+                            decoration: const InputDecoration(
+                              labelText: 'Phone Number',
+                            ),
+                            autofillHints: const [
+                              AutofillHints.telephoneNumber,
+                            ],
+                            keyboardType: TextInputType.phone,
+                          ),
+                          const SizedBox(height: 16),
                           TextButton(
                             onPressed: signUp,
-                            child: const Text('Sign In with Email'),
+                            child: const Text('Sign In'),
                           ),
                         ],
                       Authenticated() => [