diff --git a/README.md b/README.md
index 1a563c1..03dc97b 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ### TextBelt
 TextBelt (http://textbelt.com) is a texting API that uses carrier-specific gateways to deliver your text messages for free.  This is nice for a low-cost texting app or testing without running down your Twilio balance.
 
-Usage is dead simple:
+Send a text with a simple POST request:
 
 ```
 $ curl http://textbelt.com/text \
@@ -24,6 +24,8 @@ Sample failure:
 
 ### Canadian and International endpoints
 
+The /text endpoint supports U.S. phone numbers (and parts of Canada).
+
 For Canadian texts, curl `http://textbelt.com/canada`.
 
 For international texts, curl `http://textbelt.com/intl`.