diff --git a/scripts/link_imessage.py b/scripts/link_imessage.py
new file mode 100644
index 0000000..5473a52
--- /dev/null
+++ b/scripts/link_imessage.py
@@ -0,0 +1,70 @@
+"""Link an iMessage phone number to an existing user account.
+
+Usage:
+  python scripts/link_imessage.py <username_or_email> <phone_number>
+  python scripts/link_imessage.py ryan +15551234567
+
+Run inside Docker:
+  docker compose exec raggr python scripts/link_imessage.py ryan +15551234567
+"""
+
+import os
+import sys
+import asyncio
+
+from dotenv import load_dotenv
+from tortoise import Tortoise
+
+from blueprints.users.models import User
+
+load_dotenv()
+
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite://database/raggr.db")
+
+
+async def link_imessage(identifier: str, phone_number: str):
+    await Tortoise.init(
+        db_url=DATABASE_URL,
+        modules={
+            "models": [
+                "blueprints.users.models",
+                "blueprints.conversation.models",
+            ]
+        },
+    )
+
+    try:
+        user = await User.filter(username=identifier).first()
+        if not user:
+            user = await User.filter(email=identifier).first()
+        if not user:
+            print(f"Error: No user found with username or email '{identifier}'")
+            return False
+
+        conflict = (
+            await User.filter(imessage_number=phone_number).exclude(id=user.id).first()
+        )
+        if conflict:
+            print(
+                f"Error: {phone_number} is already linked to user '{conflict.username}'"
+            )
+            return False
+
+        user.imessage_number = phone_number
+        await user.save()
+        print(f"Linked {phone_number} to user '{user.username}' ({user.email})")
+        return True
+
+    finally:
+        await Tortoise.close_connections()
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print(
+            "Usage: python scripts/link_imessage.py <username_or_email> <phone_number>"
+        )
+        sys.exit(1)
+
+    success = asyncio.run(link_imessage(sys.argv[1], sys.argv[2]))
+    sys.exit(0 if success else 1)