diff --git a/radio/1.0/IRadioCallback.hal b/radio/1.0/IRadioCallback.hal
new file mode 100644
index 0000000..c27d168
--- /dev/null
+++ b/radio/1.0/IRadioCallback.hal
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 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@1.0;
+
+interface IRadioCallback {
+    /**
+     * Response callback for IRadio.requestGetSimStatus()
+     *
+     * @param serial Serial number of request
+     * @param cardStatus ICC card status
+     */
+    responseGetSimStatus(int32_t serial, RadioCardStatus cardStatus);
+
+    // ONLY UNSOLICITED CALLBACKS BELOW
+    /**
+     * Called when radio state changes.
+     *
+     * @param radioState Current radio state
+     */
+    oneway unsolRadioStateChanged(RadioState radioState);
+};