diff --git a/radio/1.3/IRadio.hal b/radio/1.3/IRadio.hal
index d582c71..2d64381 100644
--- a/radio/1.3/IRadio.hal
+++ b/radio/1.3/IRadio.hal
@@ -17,8 +17,12 @@
 package android.hardware.radio@1.3;
 
 import @1.2::IRadio;
+import @1.1::RadioAccessSpecifier;
 
 /**
+ * Note: IRadio 1.3 is an intermediate layer between Android P and Android Q. It's specifically
+ * designed for CBRS related interfaces. All other interfaces for Q are added in IRadio 1.4.
+ *
  * This interface is used by telephony and telecom to talk to cellular radio.
  * All the functions have minimum one parameter:
  * serial: which corresponds to serial no. of request. Serial numbers must only be memorized for the
@@ -27,4 +31,33 @@
  * setResponseFunctions must work with @1.1::IRadioResponse and @1.1::IRadioIndication.
  */
 interface IRadio extends @1.2::IRadio {
+    /**
+     * Specify which bands modem's background scan must act on.
+     * If specifyChannels is true, it only scans bands specified in specifiers.
+     * If specifyChannels is false, it scans all bands.
+     *
+     * For example, CBRS is only on LTE band 48. By specifying this band,
+     * modem saves more power.
+     *
+     * @param serial Serial number of request.
+     * @param specifyChannels whether to scan bands defined in specifiers.
+     * @param specifiers which bands to scan. Only used if specifyChannels is true.
+     *
+     * Response callback is IRadioResponse.setSystemSelectionChannelsResponse()
+     */
+    oneway setSystemSelectionChannels(int32_t serial, bool specifyChannels,
+            vec<RadioAccessSpecifier> specifiers);
+
+   /**
+    * Toggle logical modem on and off. It should put the logical modem in low power
+    * mode without any activity, while the SIM card remains visible. The difference
+    * with setRadioPower is, setRadioPower affects all logical modem while this controls
+    * just one.
+    *
+    * @param serial Serial number of request.
+    * @param on True to turn on the logical modem, otherwise turn it off.
+    *
+    * Response function is IRadioResponse.enableModemResponse()
+    */
+    oneway enableModem(int32_t serial, bool on);
 };
diff --git a/radio/1.3/IRadioResponse.hal b/radio/1.3/IRadioResponse.hal
index 2bcdd02..abdf2ee 100644
--- a/radio/1.3/IRadioResponse.hal
+++ b/radio/1.3/IRadioResponse.hal
@@ -17,9 +17,33 @@
 package android.hardware.radio@1.3;
 
 import @1.2::IRadioResponse;
+import @1.0::RadioResponseInfo;
 
 /**
+ * Note: IRadio 1.3 is an intermediate layer between Android P and Android Q. It's specifically
+ * designed for CBRS related interfaces. All other interfaces for Q are added in IRadio 1.4.
+ *
  * Interface declaring response functions to solicited radio requests.
  */
 interface IRadioResponse extends @1.2::IRadioResponse {
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:INVALID_ARGUMENTS
+     */
+    oneway setSystemSelectionChannelsResponse(RadioResponseInfo info);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:INTERNAL_ERR
+     */
+    oneway enableModemResponse(RadioResponseInfo info);
 };
diff --git a/radio/config/1.1/Android.bp b/radio/config/1.1/Android.bp
index 10c4c98..056510c 100644
--- a/radio/config/1.1/Android.bp
+++ b/radio/config/1.1/Android.bp
@@ -7,14 +7,20 @@
         enabled: true,
     },
     srcs: [
+        "IRadioConfig.hal",
         "IRadioConfigIndication.hal",
         "IRadioConfigResponse.hal",
+        "types.hal",
     ],
     interfaces: [
         "android.hardware.radio.config@1.0",
         "android.hardware.radio@1.0",
         "android.hidl.base@1.0",
     ],
+    types: [
+        "ModemInfo",
+        "PhoneCapability",
+    ],
     gen_java: true,
 }
 
diff --git a/radio/config/1.1/IRadioConfig.hal b/radio/config/1.1/IRadioConfig.hal
new file mode 100644
index 0000000..bc63339
--- /dev/null
+++ b/radio/config/1.1/IRadioConfig.hal
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2018 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.config@1.1;
+
+import @1.0::IRadioConfig;
+import @1.1::IRadioConfigResponse;
+import @1.1::PhoneCapability;
+
+/**
+ * Note: IRadioConfig 1.1 is an intermediate layer between Android P and Android Q.
+ * It's specifically designed for CBRS related interfaces. All other interfaces
+ * for Q are added in IRadioConfig 1.2.
+ *
+ * This interface is used by telephony and telecom to talk to cellular radio for the purpose of
+ * radio configuration, and it is not associated with any specific modem or slot.
+ * All the functions have minimum one parameter:
+ * serial: which corresponds to serial no. of request. Serial numbers must only be memorized for the
+ * duration of a method call. If clients provide colliding serials (including passing the same
+ * serial to different methods), multiple responses (one for each method call) must still be served.
+ */
+interface IRadioConfig extends @1.0::IRadioConfig {
+   /**
+     * Request current phone capability.
+     *
+     * @param serial Serial number of request.
+     *
+     * Response callback is IRadioResponse.getPhoneCapabilityResponse() which
+     * will return <@1.1::PhoneCapability>.
+     */
+    oneway getPhoneCapability(int32_t serial);
+
+   /**
+     * Set preferred data modem Id.
+     * In a multi-SIM device, notify modem layer which logical modem will be used primarily
+     * for data. It helps modem with resource optimization and decisions of what data connections
+     * should be satisfied.
+     *
+     * @param serial Serial number of request.
+     * @param modem Id the logical modem ID, which should match one of modem IDs returned
+     * from getPhoneCapability().
+     *
+     * Response callback is IRadioConfigResponse.setPreferredDataModemResponse()
+     */
+    oneway setPreferredDataModem(int32_t serial, uint8_t modemId);
+};
diff --git a/radio/config/1.1/IRadioConfigResponse.hal b/radio/config/1.1/IRadioConfigResponse.hal
index 5d75600..ec0e0ec 100644
--- a/radio/config/1.1/IRadioConfigResponse.hal
+++ b/radio/config/1.1/IRadioConfigResponse.hal
@@ -17,9 +17,37 @@
 package android.hardware.radio.config@1.1;
 
 import @1.0::IRadioConfigResponse;
+import @1.1::PhoneCapability;
+import android.hardware.radio@1.0::RadioResponseInfo;
 
 /**
+ * Note: IRadioConfig 1.1 is an intermediate layer between Android P and Android Q.
+ * It's specifically designed for CBRS related interfaces. All other interfaces
+ * for Q should be added in IRadioConfig 1.2.
+ *
  * Interface declaring response functions to solicited radio config requests.
  */
 interface IRadioConfigResponse extends @1.0::IRadioConfigResponse {
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     * @param phoneCapability <@1.1::PhoneCapability> it defines modem's capability for example
+     *        how many logical modems it has, how many data connections it supports.
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:INTERNAL_ERR
+     */
+    oneway getPhoneCapabilityResponse(RadioResponseInfo info, PhoneCapability phoneCapability);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:INVALID_ARGUMENTS
+     */
+    oneway setPreferredDataModemResponse(RadioResponseInfo info);
 };
diff --git a/radio/config/1.1/types.hal b/radio/config/1.1/types.hal
new file mode 100644
index 0000000..261f3b1
--- /dev/null
+++ b/radio/config/1.1/types.hal
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2018 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.config@1.1;
+
+/**
+ * Note: IRadioConfig 1.1 is an intermediate layer between Android P and Android Q.
+ * It's specifically designed for CBRS related interfaces. All other interfaces
+ * for Q should be added in IRadioConfig 1.2.
+ */
+
+/**
+ * A field in PhoneCapability that has information of each logical modem.
+ */
+struct ModemInfo {
+    /**
+     * Logical modem ID.
+     */
+    uint8_t modemId;
+};
+
+/**
+ * Phone capability which describes the data connection capability of modem.
+ * It's used to evaluate possible phone config change, for example from single
+ * SIM device to multi-SIM device.
+ */
+struct PhoneCapability {
+    /**
+     * maxActiveData defines how many logical modems can have
+     * PS attached simultaneously. For example, for L+L modem it
+     * should be 2.
+     */
+    uint8_t maxActiveData;
+    /**
+     * maxActiveData defines how many logical modems can have
+     * internet PDN connections simultaneously. For example, for L+L
+     * DSDS modem it’s 1, and for DSDA modem it’s 2.
+     */
+    uint8_t maxActiveInternetData;
+    /**
+     * Whether modem supports both internet PDN up so
+     * that we can do ping test before tearing down the
+     * other one.
+     */
+    bool isInternetLingeringSupported;
+    /**
+     * List of logical modem information.
+     */
+    vec<ModemInfo> logicalModemList;
+};