Make the GSM simulator more realistic

- The phone number of the phone is now built by concatenating "1555521"
  to the console port.
- Convert number in remote call by concatenating  "1555521" to the port
  number.
- Convert called number to a number starting with "1555521".
- Fixed a bug in sms_address_to_str where the length returned is
  incorrect is the length of the phone number to convert is odd.

Change-Id: Iefbdd866b6e41f6086c6e0cc33026551e3d5ae8f
diff --git a/CHANGES.TXT b/CHANGES.TXT
index 39ce001..8e0d850 100644
--- a/CHANGES.TXT
+++ b/CHANGES.TXT
@@ -27,6 +27,22 @@
    etc...
 
 ==============================================================================
+Changes between 8.0 and 7.0
+
+IMPORTANT CHANGES:
+
+OTHER:
+
+- The phone can now be called with additional numbers, using the 1-555-521
+  prefix. I.e. you can now use all of the following numbers to call/sms an
+  emulator that runs on console port 5554:
+
+  5554
+  521 5554
+  555 521 5554
+  1 555 521 5554
+
+==============================================================================
 Changes between 7.0 and 6.0
 
 IMPORTANT CHANGES: