diff --git a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/AWS.cs b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/AWS.cs
index 45d52c3..9d23432 100644
--- a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/AWS.cs
+++ b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/AWS.cs
@@ -10,7 +10,7 @@ internal class AWS
         private const string cognitoAppClientId = "2e02ha2ce6du13ldk8pai4h3d0";
         private static readonly string cognitoIdentityPoolId = $"{awsRegion}:2ad7ab1e-f48b-48a6-adfa-ac1090689c26";
         private static readonly string cognitoUserPoolId = $"{awsRegion}_UFwLcZIpq";
-        private static readonly string recoverySharePasswordLambdaFunctionName = "arn:aws:lambda:us-west-2:324457261097:function:recovery-share-password-GenerateRecoverySharePassw-bbE5ZbVAToil";
+        private static readonly string recoverySharePasswordLambdaFunctionName = $"arn:aws:lambda:{awsRegion}:324457261097:function:recovery-share-password-GenerateRecoverySharePassw-bbE5ZbVAToil";
 
         internal static async Task SignUpCognitoUserAsync(string emailAddress, string userName, Type thirdwebHttpClientType)
         {
diff --git a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/Server.cs b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/Server.cs
index 2d2b3ba..e892072 100644
--- a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/Server.cs
+++ b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/Server.cs
@@ -18,7 +18,7 @@ internal abstract class ServerBase
 
         internal abstract Task<(string authShare, string recoveryShare)> FetchAuthAndRecoverySharesAsync(string authToken);
         internal abstract Task<string> FetchAuthShareAsync(string authToken);
-        internal abstract Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider);
+        internal abstract Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider, string platform);
 
         internal abstract Task<bool> CheckIsEmailKmsOtpValidAsync(string userName, string otp);
         internal abstract Task<bool> CheckIsEmailUserOtpValidAsync(string emailAddress, string otp);
@@ -177,13 +177,13 @@ private async Task<IdTokenResponse> FetchCognitoIdTokenAsync(string authToken)
         }
 
         // embedded-wallet/headless-oauth-login-link
-        internal override async Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider)
+        internal override async Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider, string platform)
         {
             var uri = MakeUri(
                 "/embedded-wallet/headless-oauth-login-link",
                 new Dictionary<string, string>
                 {
-                    { "platform", "unity" },
+                    { "platform", platform },
                     { "authProvider", authProvider },
                     { "baseUrl", "https://embedded-wallet.thirdweb.com" }
                 }
diff --git a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.EmailOTP.cs b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.EmailOTP.cs
index aba2fd7..ecd6cfd 100644
--- a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.EmailOTP.cs
+++ b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.EmailOTP.cs
@@ -33,10 +33,10 @@ public async Task<VerifyResult> VerifyOtpAsync(string emailAddress, string otp,
             {
                 if (localStorage.Session.IsKmsWallet)
                 {
-                    // if (!await server.CheckIsEmailKmsOtpValidAsync(emailAddress, otp))
-                    // {
-                    //     throw new VerificationException("Invalid OTP", true);
-                    // }
+                    if (!await server.CheckIsEmailKmsOtpValidAsync(emailAddress, otp))
+                    {
+                        throw new VerificationException("Invalid OTP", true);
+                    }
                     Server.VerifyResult result = await server.VerifyKmsOtpAsync(emailAddress, otp, localStorage.Session.Id).ConfigureAwait(false);
                     await localStorage.RemoveSessionAsync().ConfigureAwait(false);
                     return await PostAuthSetup(result, recoveryCode, null, "EmailOTP").ConfigureAwait(false);
diff --git a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.OAuth.cs b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.OAuth.cs
index 1197e8e..e505c53 100644
--- a/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.OAuth.cs
+++ b/Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.OAuth.cs
@@ -12,9 +12,9 @@ public async Task<VerifyResult> SignInWithOauthAsync(string authProvider, string
             return await PostAuthSetup(result, recoveryCode, null, authProvider).ConfigureAwait(false);
         }
 
-        public async Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider)
+        public async Task<string> FetchHeadlessOauthLoginLinkAsync(string authProvider, string platform)
         {
-            return await server.FetchHeadlessOauthLoginLinkAsync(authProvider).ConfigureAwait(false);
+            return await server.FetchHeadlessOauthLoginLinkAsync(authProvider, platform).ConfigureAwait(false);
         }
 
         public async Task<bool> IsRecoveryCodeNeededAsync(string authResultStr)
diff --git a/Thirdweb/Thirdweb.Wallets/InAppWallet/InAppWallet.cs b/Thirdweb/Thirdweb.Wallets/InAppWallet/InAppWallet.cs
index 0da9e59..cf8fd51 100644
--- a/Thirdweb/Thirdweb.Wallets/InAppWallet/InAppWallet.cs
+++ b/Thirdweb/Thirdweb.Wallets/InAppWallet/InAppWallet.cs
@@ -90,10 +90,9 @@ public virtual async Task<string> LoginWithOauth(
                 throw new ArgumentNullException(nameof(mobileRedirectScheme), "Mobile redirect scheme cannot be null or empty on this platform.");
             }
 
-            // TODO: Use this for login link when it's ready in backend
-            var platform = "unity";
+            var platform = _client.HttpClient?.Headers["x-sdk-platform"] ?? "dotnet";
             var redirectUrl = isMobile ? mobileRedirectScheme : "http://localhost:8789/";
-            var loginUrl = await _embeddedWallet.FetchHeadlessOauthLoginLinkAsync(_authProvider);
+            var loginUrl = await _embeddedWallet.FetchHeadlessOauthLoginLinkAsync(_authProvider, platform);
             loginUrl = $"{loginUrl}?platform={platform}&redirectUrl={redirectUrl}&developerClientId={_client.ClientId}&authOption={_authProvider}";
 
             browser ??= new InAppWalletBrowser();