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 f343707..7c05984 100644
--- a/radio/1.6/vts/functional/radio_hidl_hal_api.cpp
+++ b/radio/1.6/vts/functional/radio_hidl_hal_api.cpp
@@ -433,6 +433,8 @@
                  ::android::hardware::radio::V1_6::RadioError::NONE,
                  ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS}));
     }
+
+    sleep(1);
     serial = GetRandomSerialNumber();
 
     res = radio_v1_6->setDataThrottling(serial, DataThrottlingAction::THROTTLE_ANCHOR_CARRIER,
@@ -453,6 +455,8 @@
                  ::android::hardware::radio::V1_6::RadioError::NONE,
                  ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS}));
     }
+
+    sleep(1);
     serial = GetRandomSerialNumber();
 
     res = radio_v1_6->setDataThrottling(serial, DataThrottlingAction::HOLD, 60000);
@@ -473,6 +477,8 @@
                  ::android::hardware::radio::V1_6::RadioError::NONE,
                  ::android::hardware::radio::V1_6::RadioError::INVALID_ARGUMENTS}));
     }
+
+    sleep(1);
     serial = GetRandomSerialNumber();
 
     res = radio_v1_6->setDataThrottling(serial, DataThrottlingAction::NO_DATA_THROTTLING, 60000);