diff --git a/openapi.yaml b/openapi.yaml
index 465e4ff..02c1526 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -6180,7 +6180,7 @@ components:
         _id: { type: string }
         platform:
           type: string
-          enum: [tiktok, instagram, facebook, youtube, linkedin, twitter, threads, pinterest, reddit, bluesky, googlebusiness, telegram, snapchat, discord, slack, whatsapp, linkedinads, metaads, pinterestads, tiktokads, xads, googleads, openaiads]
+          enum: [tiktok, instagram, facebook, youtube, linkedin, twitter, threads, pinterest, reddit, bluesky, googlebusiness, telegram, snapchat, discord, slack, whatsapp, linkedinads, metaads, pinterestads, tiktokads, xads, googleads, openaiads, sms, phone, rcs]
         profileId:
           oneOf:
             - type: string
diff --git a/pyproject.toml b/pyproject.toml
index ac85cb9..1352856 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "zernio-sdk"
-version = "1.4.507"
+version = "1.4.508"
 description = "The official Python library for the Zernio API"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/src/late/__init__.py b/src/late/__init__.py
index 1a7f374..0c93bd4 100644
--- a/src/late/__init__.py
+++ b/src/late/__init__.py
@@ -42,7 +42,7 @@
     Visibility,
 )
 
-__version__ = "1.4.507"
+__version__ = "1.4.508"
 
 __all__ = [
     # Client
diff --git a/src/late/mcp/constants.py b/src/late/mcp/constants.py
index a7cf7cd..05740a1 100644
--- a/src/late/mcp/constants.py
+++ b/src/late/mcp/constants.py
@@ -4,7 +4,7 @@
 
 # Server information
 SERVICE_NAME = "Zernio MCP Server"
-SERVICE_VERSION = "1.2.0"
+SERVICE_VERSION = "1.2.1"
 # Streamable HTTP is the primary transport (single endpoint, request/response
 # with optional chunked streaming — no long-idle connection for proxies or
 # bridges like mcp-remote to kill). Legacy SSE is still served for backwards
diff --git a/src/late/models/_generated/models.py b/src/late/models/_generated/models.py
index 71db156..88b24ff 100644
--- a/src/late/models/_generated/models.py
+++ b/src/late/models/_generated/models.py
@@ -1,6 +1,6 @@
 # generated by datamodel-codegen:
 #   filename:  openapi.yaml
-#   timestamp: 2026-08-14T17:14:31+00:00
+#   timestamp: 2026-08-15T06:14:00+00:00
 
 from __future__ import annotations
 
@@ -7071,6 +7071,9 @@ class Platform13(str, Enum):
     XADS = "xads"
     GOOGLEADS = "googleads"
     OPENAIADS = "openaiads"
+    SMS = "sms"
+    PHONE = "phone"
+    RCS = "rcs"
 
 
 class SocialAccount(BaseModel):
diff --git a/tests/test_accounts_phone_platform.py b/tests/test_accounts_phone_platform.py
new file mode 100644
index 0000000..5ced1e4
--- /dev/null
+++ b/tests/test_accounts_phone_platform.py
@@ -0,0 +1,116 @@
+"""
+Regression tests for zernio-claude-plugin#3: accounts_list failed pydantic
+validation whenever the connected-account list contained a `phone` account.
+
+GET /v1/accounts returns every SocialAccount on the profile, including the
+telephony platforms (`phone`, `sms`, `rcs`) that back the Phone Numbers
+product. The generated SocialAccount platform enum only listed the social and
+ads platforms, so `AccountsListResponse.model_validate` raised
+`accounts.N.platform ... [type=enum, input_value=phone]` and the MCP core tool
+errored while the raw passthrough tool (accounts_list_accounts, untyped dict)
+kept working.
+
+These tests drive the real typed SDK path (httpx.MockTransport, no network)
+with a payload containing a phone account, exactly the shape that failed in
+production.
+"""
+
+from __future__ import annotations
+
+import json
+from typing import Any
+
+import httpx
+import pytest
+
+import late.client.base as client_base
+from late import Late
+from late.mcp import server as mcp_server
+from late.models import AccountsListResponse
+
+PHONE_ACCOUNT = {
+    "_id": "a-phone",
+    "platform": "phone",
+    "profileId": "prof_1",
+    "username": "+14155551234",
+    "displayName": "Support line",
+    "isActive": True,
+}
+
+ACCOUNTS_PAYLOAD = {
+    "accounts": [
+        {
+            "_id": "a-ig",
+            "platform": "instagram",
+            "profileId": "prof_1",
+            "username": "acme",
+            "isActive": True,
+        },
+        PHONE_ACCOUNT,
+        {
+            "_id": "a-sms",
+            "platform": "sms",
+            "profileId": "prof_1",
+            "username": "+14155550000",
+            "isActive": True,
+        },
+    ],
+    "hasAnalyticsAccess": False,
+}
+
+
+@pytest.fixture()
+def client(monkeypatch: pytest.MonkeyPatch) -> Late:
+    """Route all SDK HTTP traffic to a fake accounts API and wire up MCP."""
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        if request.method == "GET" and request.url.path == "/api/v1/accounts":
+            return httpx.Response(
+                200,
+                content=json.dumps(ACCOUNTS_PAYLOAD),
+                headers={"Content-Type": "application/json"},
+            )
+        return httpx.Response(404, json={"error": f"unexpected: {request.url.path}"})
+
+    real_client = httpx.Client
+
+    def patched_client(**kwargs: Any) -> httpx.Client:
+        kwargs["transport"] = httpx.MockTransport(handler)
+        return real_client(**kwargs)
+
+    monkeypatch.setattr(client_base.httpx, "Client", patched_client)
+    late = Late(api_key="test-key")
+    monkeypatch.setattr(mcp_server, "_get_client", lambda: late)
+    return late
+
+
+@pytest.mark.parametrize("platform", ["phone", "sms", "rcs"])
+def test_response_model_accepts_telephony_platforms(platform: str) -> None:
+    payload = {
+        "accounts": [{**PHONE_ACCOUNT, "platform": platform}],
+        "hasAnalyticsAccess": False,
+    }
+    response = AccountsListResponse.model_validate(payload)
+    assert response.accounts[0].platform.value == platform
+
+
+def test_typed_list_preserves_phone_account_fields(client: Late) -> None:
+    response = client.accounts.list()
+
+    assert isinstance(response, AccountsListResponse)
+    assert len(response.accounts) == 3
+    phone = next(a for a in response.accounts if a.platform.value == "phone")
+    assert phone.field_id == "a-phone"
+    assert phone.username == "+14155551234"
+    assert phone.displayName == "Support line"
+    assert phone.isActive is True
+
+
+@pytest.mark.usefixtures("client")
+def test_mcp_accounts_list_returns_all_accounts() -> None:
+    result = mcp_server.accounts_list()
+
+    assert "validation error" not in result
+    assert "Found 3 connected account(s)" in result
+    assert "phone: +14155551234 (ID: a-phone)" in result
+    assert "instagram: acme (ID: a-ig)" in result
diff --git a/uv.lock b/uv.lock
index 3befffb..81474a6 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2389,7 +2389,7 @@ wheels = [
 
 [[package]]
 name = "zernio-sdk"
-version = "1.4.506"
+version = "1.4.508"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },