X-Git-Url: https://git.nmode.ca/signal-cli/blobdiff_plain/fb81bf1d05f46c521ca0bd136728ca6024d7ba4a..68b7416e572ce36f27a38d2fc7e195cb508cf00d:/README.md

diff --git a/README.md b/README.md
index 03455d12..e6d6e5ff 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,10 @@ For this use-case, it has a daemon mode with JSON-RPC interface ([man page](http
 and D-BUS interface ([man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli-dbus.5.adoc)) .
 For the JSON-RPC interface there's also a simple [example client](https://github.com/AsamK/signal-cli/tree/master/client), written in Rust.
 
+signal-cli needs to be kept up-to-date to keep up with Signal-Server changes.
+The official Signal clients expire after three months and then the Signal-Server can make incompatible changes.
+So signal-cli releases older than three months may not work correctly.
+
 ## Installation
 
 You can [build signal-cli](#building) yourself or use
@@ -55,8 +59,15 @@ of all country codes.)
 
       signal-cli -a ACCOUNT register
 
-  You can register Signal using a landline 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.
+  You can register Signal using a landline number. In this case, you need to follow the procedure below:
+   * Attempt a SMS verification process first (`signal-cli -a ACCOUNT register`)
+     * You will get an error `400 (InvalidTransportModeException)`, this is normal
+   * Wait 60 seconds
+   * Attempt a voice call verification by adding the `--voice` switch and wait for the call:
+
+     ```sh
+     signal-cli -a ACCOUNT register --voice
+     ```
 
   Registering may require solving a CAPTCHA
   challenge: [Registration with captcha](https://github.com/AsamK/signal-cli/wiki/Registration-with-captcha)