diff --git a/radio/deprecated/1.0/IOemHook.hal b/radio/deprecated/1.0/IOemHook.hal
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+/**
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.radio.deprecated@1.0;
+
+import IOemHookResponse;
+import IOemHookIndication;
+
+/**
+ * This interface has APIs for OEM-specific use-cases.
+ * USE OF THIS INTERFACE IS DISCOURATED. IT IS PRESENT ONLY FOR BACKWARD COMPATIBILITY AND WILL BE
+ * REMOVED IN O (ATTEMPTING TO REMOVE IT IN O, BUT IF NOT IN O WILL BE REMOVED IN P).
+ * ALSO NOTE THAT FRAMEWORK EXPECTS THE SERVICE IMPLEMENTING THIS INTERFACE TO RESIDE
+ * IN THE SAME PROCESS AS IRADIO SERVICE.
+ */
+interface IOemHook {
+    /**
+     * Set response functions for oem hook requests & oem hook indications.
+     *
+     * @param oemHookResponse Object containing response functions
+     * @param oemHookIndication Object containing oem hook indications
+     */
+    setResponseFunctions(IOemHookResponse oemHookResponse, IOemHookIndication oemHookIndication);
+
+    /**
+     * This request passes raw byte arrays between framework and vendor code.
+     *
+     * @param serial Serial number of request.
+     * @param data data passed as raw bytes
+     *
+     * Response function is IOemHookResponse.sendRequestRawResponse()
+     */
+    oneway sendRequestRaw(int32_t serial, vec<uint8_t> data);
+
+    /**
+     * This request passes strings between framework and vendor code.
+     *
+     * @param serial Serial number of request.
+     * @param data data passed as strings
+     *
+     * Response function is IOemHookResponse.sendRequestStringsResponse()
+     */
+    oneway sendRequestStrings(int32_t serial, vec<string> data);
+};
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