diff --git a/.changeset/device-details-signal.md b/.changeset/device-details-signal.md
new file mode 100644
index 00000000..f1e5503c
--- /dev/null
+++ b/.changeset/device-details-signal.md
@@ -0,0 +1,5 @@
+---
+'fingerprint-pro-server-api-openapi': minor
+---
+
+**events**: Add `device_details` smart signal to `Event`
diff --git a/schemas/components/schemas/Event.yaml b/schemas/components/schemas/Event.yaml
index 4007c466..65b2872f 100644
--- a/schemas/components/schemas/Event.yaml
+++ b/schemas/components/schemas/Event.yaml
@@ -160,6 +160,11 @@ properties:
       - browser
       - android
       - ios
+  device_details:
+    $ref: smartsignals/DeviceDetails.yaml
+    x-platforms:
+      - android
+      - ios
   emulator:
     $ref: smartsignals/Emulator.yaml
     x-platforms:
diff --git a/schemas/components/schemas/smartsignals/DeviceDetails.yaml b/schemas/components/schemas/smartsignals/DeviceDetails.yaml
new file mode 100644
index 00000000..620b4ba9
--- /dev/null
+++ b/schemas/components/schemas/smartsignals/DeviceDetails.yaml
@@ -0,0 +1,25 @@
+type: object
+additionalProperties: false
+description: Native, SDK-collected mobile device identification signals (manufacturer, model, and OS version). Structurally separate from the top-level `device`, `os`, and `os_version` fields and from `browser_details`, all of which are derived from user-agent parsing rather than native SDK signals.
+required: []
+properties:
+  device_manufacturer:
+    type: string
+    examples:
+      - samsung
+      - Apple
+    description: 'Raw device manufacturer string as reported by the device OS. Not normalized: casing is vendor-defined (samsung, Xiaomi, OPPO, HUAWEI). Always `Apple` on iOS.'
+  device_model:
+    type: string
+    examples:
+      - SM-G991U
+      - iPhone14,5
+    description: Raw device model identifier, as reported by the mobile OS.
+  os_version:
+    type: string
+    examples:
+      - '9'
+      - '16.1'
+      - 8.1.0
+      - 17.4.1
+    description: 'Mobile operating system version. Component count is not fixed and must not be assumed by consumers: iOS always reports `major.minor.patch` (e.g. `17.4.1`), while Android''s precision varies by OS era and which raw signal resolved it — `major` only (`9`, `13`) since Android 10 dropped point releases, `major.minor` (`16.1`) from Android 16 (API 36+) reintroducing a minor component, or a genuine `major.minor.patch` (`8.1.0`) on pre-Android 10 devices that shipped real point releases. Never a fabricated/zero-padded component.'
diff --git a/schemas/paths/examples/events/get_event_200.json b/schemas/paths/examples/events/get_event_200.json
index 72f12f44..e3446c04 100644
--- a/schemas/paths/examples/events/get_event_200.json
+++ b/schemas/paths/examples/events/get_event_200.json
@@ -185,6 +185,11 @@
     }
   },
   "developer_tools": false,
+  "device_details": {
+    "device_manufacturer": "samsung",
+    "device_model": "SM-G991U",
+    "os_version": "13"
+  },
   "mitm_attack": false,
   "sdk": {
     "platform": "js",
diff --git a/schemas/paths/examples/events/get_event_200_with_unknown_field.json b/schemas/paths/examples/events/get_event_200_with_unknown_field.json
index e6712e39..39bc6324 100644
--- a/schemas/paths/examples/events/get_event_200_with_unknown_field.json
+++ b/schemas/paths/examples/events/get_event_200_with_unknown_field.json
@@ -186,6 +186,11 @@
     }
   },
   "developer_tools": false,
+  "device_details": {
+    "device_manufacturer": "samsung",
+    "device_model": "SM-G991U",
+    "os_version": "13"
+  },
   "mitm_attack": false,
   "sdk": {
     "platform": "js",
diff --git a/schemas/paths/examples/events/get_event_ruleset_200.json b/schemas/paths/examples/events/get_event_ruleset_200.json
index f775f7d9..94863ac3 100644
--- a/schemas/paths/examples/events/get_event_ruleset_200.json
+++ b/schemas/paths/examples/events/get_event_ruleset_200.json
@@ -185,6 +185,11 @@
     }
   },
   "developer_tools": false,
+  "device_details": {
+    "device_manufacturer": "samsung",
+    "device_model": "SM-G991U",
+    "os_version": "13"
+  },
   "mitm_attack": false,
   "sdk": {
     "platform": "js",
diff --git a/schemas/paths/examples/events/get_event_with_bot_info_200.json b/schemas/paths/examples/events/get_event_with_bot_info_200.json
index 98ca7d5c..c346afff 100644
--- a/schemas/paths/examples/events/get_event_with_bot_info_200.json
+++ b/schemas/paths/examples/events/get_event_with_bot_info_200.json
@@ -191,6 +191,11 @@
     }
   },
   "developer_tools": false,
+  "device_details": {
+    "device_manufacturer": "samsung",
+    "device_model": "SM-G991U",
+    "os_version": "13"
+  },
   "mitm_attack": false,
   "sdk": {
     "platform": "js",
diff --git a/schemas/paths/examples/events/search/get_event_search_200.json b/schemas/paths/examples/events/search/get_event_search_200.json
index 8e9dbdc8..5729c37d 100644
--- a/schemas/paths/examples/events/search/get_event_search_200.json
+++ b/schemas/paths/examples/events/search/get_event_search_200.json
@@ -187,6 +187,11 @@
         }
       },
       "developer_tools": false,
+      "device_details": {
+        "device_manufacturer": "samsung",
+        "device_model": "SM-G991U",
+        "os_version": "13"
+      },
       "mitm_attack": false,
       "sdk": {
         "platform": "js",