diff --git a/radio/1.2/Android.bp b/radio/1.2/Android.bp
index cdb9bf6..3e678bb 100644
--- a/radio/1.2/Android.bp
+++ b/radio/1.2/Android.bp
@@ -19,6 +19,7 @@
         "android.hidl.base@1.0",
     ],
     types: [
+        "CardStatus",
         "CellIdentityCdma",
         "CellIdentityGsm",
         "CellIdentityLte",
@@ -35,6 +36,8 @@
         "NetworkScanResult",
         "RadioConst",
         "ScanIntervalRange",
+        "SimSlotStatus",
+        "SlotState",
     ],
     gen_java: true,
 }
diff --git a/radio/1.2/IRadio.hal b/radio/1.2/IRadio.hal
index 6ae78a0..73f1024 100644
--- a/radio/1.2/IRadio.hal
+++ b/radio/1.2/IRadio.hal
@@ -37,4 +37,46 @@
      * Response function is IRadioResponse.startNetworkScanResponse()
      */
     oneway startNetworkScan_1_2(int32_t serial, NetworkScanRequest request);
+
+    /**
+     * Get SIM Slot status.
+     *
+     * Request provides the slot status of all active and inactive SIM slots and whether card is
+     * present in the slots or not.
+     *
+     * @param serial Serial number of request.
+     *
+     * Response callback is IRadioResponse.getSimSlotsStatusResponse()
+     */
+    oneway getSimSlotsStatus(int32_t serial);
+
+    /**
+     * Set SIM Slot mapping.
+
+     * Maps the logical slots to the physical slots. Logical slot is the slot that is seen by modem.
+     * Physical slot is the actual physical slot. Request maps the physical slot to logical slot.
+     * Logical slots that are already mapped to the requested physical slot are not impacted.
+     *
+     * Example no. of logical slots 1 and physical slots 2:
+     * The only logical slot (index 0) can be mapped to first physical slot (value 0) or second
+     * physical slot(value 1), while the other physical slot remains unmapped and inactive.
+     * slotMap[0] = 1 or slotMap[0] = 0
+     *
+     * Example no. of logical slots 2 and physical slots 2:
+     * First logical slot (index 0) can be mapped to physical slot 1 or 2 and other logical slot
+     * can be mapped to other physical slot. Each logical slot must be mapped to a physical slot.
+     * slotMap[0] = 0 and slotMap[1] = 1 or slotMap[0] = 1 and slotMap[1] = 0
+     *
+     * @param serial Serial number of request
+     * @param slotMap Logical to physical slot mapping, size == no. of radio instances. Index is
+     *        mapping to logical slot and value to physical slot, need to provide all the slots
+     *        mapping when sending request in case of multi slot device.
+     *        EX: uint32_t slotMap[logical slot] = physical slot
+     *        index 0 is the first logical_slot number of logical slots is equal to number of Radio
+     *        instances and number of physical slots is equal to size of slotStatus in
+     *        getSimSlotsStatusResponse
+     *
+     * Response callback is IRadioResponse.setSimSlotsMappingResponse()
+     */
+    oneway setSimSlotsMapping(int32_t serial, vec<uint32_t> slotMap);
 };
diff --git a/radio/1.2/IRadioIndication.hal b/radio/1.2/IRadioIndication.hal
index 5d3efcf..4aae74d 100644
--- a/radio/1.2/IRadioIndication.hal
+++ b/radio/1.2/IRadioIndication.hal
@@ -28,4 +28,13 @@
      * Incremental network scan results
      */
     oneway networkScanResult_1_2(RadioIndicationType type, NetworkScanResult result);
-};
\ No newline at end of file
+
+    /**
+     * Indicates SIM slot status change.
+     *
+     * @param type Type of radio indication
+     * @param slotStatus new slot status info with size equals to the number of physical slots on
+     *        the device
+     */
+    oneway simSlotsStatusChanged(RadioIndicationType type, vec<SimSlotStatus> slotStatus);
+};
diff --git a/radio/1.2/IRadioResponse.hal b/radio/1.2/IRadioResponse.hal
index 5bfbbae..cf6bc00 100644
--- a/radio/1.2/IRadioResponse.hal
+++ b/radio/1.2/IRadioResponse.hal
@@ -41,4 +41,42 @@
      *   RadioError:CANCELLED
      */
     oneway getCellInfoListResponse_1_2(RadioResponseInfo info, vec<CellInfo> cellInfo);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     * @param cardStatus ICC card status as defined by CardStatus in types.hal
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     */
+    oneway getIccCardStatusResponse_1_2(RadioResponseInfo info, CardStatus cardStatus);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     * @param slotStatus Sim slot struct containing all the physical SIM slots info with size
+      *       equals to the number of physical slots on the device
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:REQUEST_NOT_SUPPORTED
+     *   RadioError:NO_MEMORY
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:MODEM_ERR
+     *   RadioError:INVALID_ARGUMENTS
+     */
+    oneway getSimSlotsStatusResponse(RadioResponseInfo info, vec<SimSlotStatus> slotStatus);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:REQUEST_NOT_SUPPORTED
+     *   RadioError:NO_MEMORY
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:MODEM_ERR
+     */
+    oneway setSimSlotsMappingResponse(RadioResponseInfo info);
 };
diff --git a/radio/1.2/types.hal b/radio/1.2/types.hal
index 52af575..1e28d3b 100644
--- a/radio/1.2/types.hal
+++ b/radio/1.2/types.hal
@@ -17,6 +17,8 @@
 package android.hardware.radio@1.2;
 
 import @1.0::CdmaSignalStrength;
+import @1.0::CardState;
+import @1.0::CardStatus;
 import @1.0::CellIdentityCdma;
 import @1.0::CellIdentityGsm;
 import @1.0::CellIdentityLte;
@@ -187,37 +189,97 @@
      * Cell type for selecting from union CellInfo.
      */
     CellInfoType cellInfoType;
-    /*
+    /**
      * True if this cell is registered false if not registered.
      */
     bool registered;
-    /*
+    /**
      * Type of time stamp represented by timeStamp.
      */
     TimeStampType timeStampType;
-    /*
+    /**
      * Time in nanos as returned by ril_nano_time.
      */
     uint64_t timeStamp;
-    /*
+    /**
      * Only one of the below vectors must be of size 1 based on the CellInfoType and others must be
      * of size 0.
      */
     vec<CellInfoGsm> gsm;
-    /*
+    /**
      * Valid only if type = cdma and size = 1 else must be empty.
      */
     vec<CellInfoCdma> cdma;
-    /*
+    /**
      * Valid only if type = lte and size = 1 else must be empty.
      */
     vec<CellInfoLte> lte;
-    /*
+    /**
      * Valid only if type = wcdma and size = 1 else must be empty.
      */
     vec<CellInfoWcdma> wcdma;
-    /*
+    /**
      * Valid only if type = tdscdma and size = 1 else must be empty.
      */
     vec<CellInfoTdscdma> tdscdma;
 };
+
+enum SlotState : int32_t {
+    /**
+     * Physical slot is inactive
+     */
+    INACTIVE  = 0x00,
+    /**
+     * Physical slot is active
+     */
+    ACTIVE    = 0x01,
+};
+
+struct CardStatus {
+    @1.0::CardStatus base;
+    uint32_t physicalSlotId;
+    /**
+     * An Answer To Reset (ATR) is a message output by a Smart Card conforming to ISO/IEC 7816
+     * standards, following electrical reset of the card's chip. The ATR conveys information about
+     * the communication parameters proposed by the card, and the card's nature and state.
+     *
+     * This data is applicable only when cardState is CardState:PRESENT.
+     */
+    string atr;
+    /**
+     * Integrated Circuit Card IDentifier (ICCID) is Unique Identifier of the SIM CARD. File is
+     * located in the SIM card at EFiccid (0x2FE2) as per ETSI 102.221. The ICCID is defined by
+     * the ITU-T recommendation E.118 ISO/IEC 7816.
+     *
+     * This data is applicable only when cardState is CardState:PRESENT.
+     */
+    string iccid;
+};
+
+struct SimSlotStatus {
+    /**
+     * Card state in the physical slot
+     */
+    CardState cardState;
+    /**
+     * Slot state Active/Inactive
+     */
+    SlotState slotState;
+    /**
+     * An Answer To Reset (ATR) is a message output by a Smart Card conforming to ISO/IEC 7816
+     * standards, following electrical reset of the card's chip. The ATR conveys information about
+     * the communication parameters proposed by the card, and the card's nature and state.
+     *
+     * This data is applicable only when cardState is CardState:PRESENT.
+     */
+    string atr;
+    uint32_t logicalSlotId;
+    /**
+     * Integrated Circuit Card IDentifier (ICCID) is Unique Identifier of the SIM CARD. File is
+     * located in the SIM card at EFiccid (0x2FE2) as per ETSI 102.221. The ICCID is defined by
+     * the ITU-T recommendation E.118 ISO/IEC 7816.
+     *
+     * This data is applicable only when cardState is CardState:PRESENT.
+     */
+    string iccid;
+};