diff --git a/radio/1.6/IRadio.hal b/radio/1.6/IRadio.hal
index 7f874c6..2e64008 100644
--- a/radio/1.6/IRadio.hal
+++ b/radio/1.6/IRadio.hal
@@ -217,6 +217,13 @@
      * Each subsequent request to this method is processed only after the
      * completion of the previous one.
      *
+     * When the SIM is in POWER_DOWN, the modem should send an empty vector of
+     * AppStatus in CardStatus.applications. If a SIM in the POWER_DOWN state
+     * is removed and a new SIM is inserted, the new SIM should be in POWER_UP
+     * mode by default. If the device is turned off or restarted while the SIM
+     * is in POWER_DOWN, then the SIM should turn on normally in POWER_UP mode
+     * when the device turns back on.
+     *
      * Response callback is IRadioResponse.setSimCardPowerResponse_1_6().
      * Note that this differs from setSimCardPower_1_1 in that the response
      * callback should only be sent once the device has finished executing
diff --git a/radio/1.6/IRadioResponse.hal b/radio/1.6/IRadioResponse.hal
index c545db0..36e3ee4 100644
--- a/radio/1.6/IRadioResponse.hal
+++ b/radio/1.6/IRadioResponse.hal
@@ -207,7 +207,6 @@
      * Valid errors returned:
      *   RadioError:NONE
      *   RadioError:RADIO_NOT_AVAILABLE
-     *   RadioError:REQUEST_NOT_SUPPORTED
      *   RadioError:INVALID_ARGUMENTS
      *   RadioError:SIM_ERR (indicates a timeout or other issue making the SIM unresponsive)
      *
diff --git a/radio/1.6/vts/functional/radio_hidl_hal_api.cpp b/radio/1.6/vts/functional/radio_hidl_hal_api.cpp
index d3ffba9..ba825b8 100644
--- a/radio/1.6/vts/functional/radio_hidl_hal_api.cpp
+++ b/radio/1.6/vts/functional/radio_hidl_hal_api.cpp
@@ -320,7 +320,6 @@
 
     res = radio_v1_6->setDataThrottling(serial, DataThrottlingAction::THROTTLE_ANCHOR_CARRIER, 60);
     ASSERT_OK(res);
-
     EXPECT_EQ(std::cv_status::no_timeout, wait());
     EXPECT_EQ(RadioResponseType::SOLICITED, radioRsp_v1_6->rspInfo.type);
     EXPECT_EQ(serial, radioRsp_v1_6->rspInfo.serial);
@@ -350,7 +349,6 @@
 
     res = radio_v1_6->setDataThrottling(serial, DataThrottlingAction::NO_DATA_THROTTLING, 60);
     ASSERT_OK(res);
-
     EXPECT_EQ(std::cv_status::no_timeout, wait());
     EXPECT_EQ(RadioResponseType::SOLICITED, radioRsp_v1_6->rspInfo.type);
     EXPECT_EQ(serial, radioRsp_v1_6->rspInfo.serial);
@@ -360,4 +358,50 @@
                               ::android::hardware::radio::V1_6::RadioError::MODEM_ERR,
                               ::android::hardware::radio::V1_6::RadioError::NONE,
                               ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS}));
-}
\ No newline at end of file
+}
+
+/*
+ * Test IRadio.setSimCardPower_1_6() for the response returned.
+ */
+TEST_P(RadioHidlTest_v1_6, setSimCardPower_1_6) {
+    /* Test setSimCardPower power down */
+    serial = GetRandomSerialNumber();
+    radio_v1_6->setSimCardPower_1_6(serial, CardPowerState::POWER_DOWN);
+    EXPECT_EQ(std::cv_status::no_timeout, wait());
+    EXPECT_EQ(RadioResponseType::SOLICITED, radioRsp_v1_6->rspInfo.type);
+    EXPECT_EQ(serial, radioRsp_v1_6->rspInfo.serial);
+    ASSERT_TRUE(
+            CheckAnyOfErrors(radioRsp_v1_6->rspInfo.error,
+                             {::android::hardware::radio::V1_6::RadioError::NONE,
+                              ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS,
+                              ::android::hardware::radio::V1_6::RadioError::RADIO_NOT_AVAILABLE}));
+
+    // setSimCardPower_1_6 does not return  until the request is handled, and should not trigger
+    // CardState::ABSENT when turning off power
+    if (radioRsp_v1_6->rspInfo.error == ::android::hardware::radio::V1_6::RadioError::NONE) {
+        /* Wait some time for setting sim power down and then verify it */
+        updateSimCardStatus();
+        EXPECT_EQ(CardState::PRESENT, cardStatus.base.base.base.cardState);
+        // applications should be an empty vector of AppStatus
+        EXPECT_EQ(0, cardStatus.applications.size());
+    }
+
+    /* Test setSimCardPower power up */
+    serial = GetRandomSerialNumber();
+    radio_v1_6->setSimCardPower_1_6(serial, CardPowerState::POWER_UP);
+    EXPECT_EQ(std::cv_status::no_timeout, wait());
+    EXPECT_EQ(RadioResponseType::SOLICITED, radioRsp_v1_6->rspInfo.type);
+    EXPECT_EQ(serial, radioRsp_v1_6->rspInfo.serial);
+    ASSERT_TRUE(
+            CheckAnyOfErrors(radioRsp_v1_6->rspInfo.error,
+                             {::android::hardware::radio::V1_6::RadioError::NONE,
+                              ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS,
+                              ::android::hardware::radio::V1_6::RadioError::RADIO_NOT_AVAILABLE}));
+
+    // setSimCardPower_1_6 does not return  until the request is handled. Just verify that we still
+    // have CardState::PRESENT after turning the power back on
+    if (radioRsp_v1_6->rspInfo.error == ::android::hardware::radio::V1_6::RadioError::NONE) {
+        updateSimCardStatus();
+        EXPECT_EQ(CardState::PRESENT, cardStatus.base.base.base.cardState);
+    }
+}