docs: clarify region and line guidance

README.md

@@ -402,14 +402,15 @@ For authentication, webhooks, and the full reference, see the [API docs](https:/
 
 ## Supported Regions and Languages
 
-Publicly supported: **22 countries**, updated September 14, 2026. Use these country codes with the SDK and API recipient settings.
+Use these country codes with the SDK and API recipient settings.
 
 | Country | Country Code | Calling Code | Languages | Line Region |
 | --- | --- | --- | --- | --- |
+| United States of America | `US` | +1 | English, Indonesian | Local |
+| Canada | `CA` | +1 | English | Local |
 | Australia | `AU` | +61 | English | International |
 | Bangladesh | `BD` | +880 | English, Bengali | International |
 | Brazil | `BR` | +55 | English, Portuguese | International |
-| Canada | `CA` | +1 | English | Local |
 | Germany | `DE` | +49 | English, German | International |
 | Spain | `ES` | +34 | English, Spanish | International |
 | Finland | `FI` | +358 | English, Finnish | International |
@@ -426,14 +427,13 @@ Publicly supported: **22 countries**, updated September 14, 2026. Use these coun
 | Singapore | `SG` | +65 | English | International |
 | Thailand | `TH` | +66 | English, Thai | International |
 | Turkey | `TR` | +90 | Turkish | International |
-| United States of America | `US` | +1 | English, Indonesian | Local |
 | Viet Nam | `VN` | +84 | English, Vietnamese | International |
 
 **Notes**
 
-- **Line Region** describes the caller ID shown to the recipient. The table reflects the current default +1 caller ID; using a purchased or assigned phone number can change the line region.
-- **Local** means the caller ID is in the destination's country or calling-code region. With the default +1 caller ID, the United States and Canada are Local.
-- **International** means the caller ID is outside the destination's country or calling-code region. These lines are primarily intended for testing. For production use with a local phone number, contact the CALL-E team to enable a local line for the destination country.
+- **Local** means calls use a local number in the destination country or calling-code region.
+- **International** means calls use an international number. These numbers are intended primarily for development and call testing, and calls through the shared international number pool may cost more.
+- **Region not listed?** Use a SIP integration to call that destination. For risk-control reasons, we enable additional International regions for development and testing only after careful review.
 
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