diff --git a/README.md b/README.md
index b4ad071..e25529a 100644
--- a/README.md
+++ b/README.md
@@ -92,9 +92,9 @@ Since version 3.0.0, a new approach to login/configuration has been added. Some
 
 ```csharp
 WTelegram.Client client = new WTelegram.Client(YOUR_API_ID, "YOUR_API_HASH");
-await DoLogin("+12025550156");
+await DoLogin("+12025550156"); // user's phone_number
 
-async Task DoLogin(string loginInfo) // add this method to your code
+async Task DoLogin(string loginInfo) // (add this method to your code)
 {
     while (client.User == null)
         switch (await client.Login(loginInfo)) // returns which config info is needed to continue login
diff --git a/src/Client.cs b/src/Client.cs
index da3ee18..2a06512 100644
--- a/src/Client.cs
+++ b/src/Client.cs
@@ -1119,7 +1119,10 @@ namespace WTelegram
 				authorization = await this.Auth_SignUp(phone_number, sentCode.phone_code_hash, first_name, last_name);
 			}
 #pragma warning restore CS0618
-			return LoginAlreadyDone(authorization);
+			LoginAlreadyDone(authorization);
+			if (User.phone != string.Concat(phone_number.Where(char.IsDigit)))
+				Helpers.Log(3, $"Mismatched phone_number (+{User.phone} != {phone_number}). Fix this to avoid verification code each time");
+			return User;
 		}
 
 		/// <summary><b>[Not recommended]</b> You can use this if you have already obtained a login authorization manually</summary>