diff --git a/Quickstart.md b/Quickstart.md
index 1a6ae90..f281657 100644
--- a/Quickstart.md
+++ b/Quickstart.md
@@ -39,7 +39,9 @@ After a few seconds, you will receive an SMS on the cell phone with phone number
 > SIGNAL: Your code is:  **123-456**
 > 25 Feb. 2017 10:52
 
-Note: You can register Signal using a land line number. In this case you can skip SMS verification process and jump directly to the voice call verification by adding the `--voice` switch at the end of above register command.
+_Note: You can register Signal using a land line number. In this case, you must first follow the normal verification procedure (as if it were a cell phone), wait 60s, then register again with the `--voice` switch at the end of above register command in order to receive an automated voice call._
+
+_If you do not try to register by SMS first (without `--voice`) or if you did not wait long enough, you will get this error message : `Failed to register: [429] Rate limit exceeded: 429 (RateLimitException)`_
 
 2. Verify your phone number
 Enter