diff --git a/services/sim/src/multi_sim_controller.cpp b/services/sim/src/multi_sim_controller.cpp
index ca8c3d72f6e7c1b7e32e7e05433bf87b74040923..1c50e48203c7bebd9e95d6a4b62b326a48ed78ca 100644
--- a/services/sim/src/multi_sim_controller.cpp
+++ b/services/sim/src/multi_sim_controller.cpp
@@ -353,6 +353,8 @@ bool MultiSimController::InitShowNumber(int slotId)
     int32_t result = TELEPHONY_ERROR;
     if (!showNumber.empty()) {
         result = SetShowNumberToDB(slotId, showNumber);
+        TELEPHONY_LOGI(
+            "Init slotId: %{public}d get phone number from sim and save result: %{public}d", slotId, result);
     }
     return result == TELEPHONY_ERR_SUCCESS;
 }
@@ -1101,8 +1103,13 @@ int32_t MultiSimController::GetShowNumber(int32_t slotId, std::u16string &showNu
     }
     showNumber = simFileManager_[slotId]->GetSimTelephoneNumber();
     if (!showNumber.empty()) {
-        int32_t result = SetShowNumberToDB(slotId, showNumber);
-        TELEPHONY_LOGI("slotId: %{public}d get phone number from sim and save result: %{public}d", slotId, result);
+        if (showNumber != Str8ToStr16(localCacheInfo_[slotId].phoneNumber)) {
+            TelFFRTUtils::Submit([=]() {
+                int32_t result = SetShowNumberToDB(slotId, showNumber);
+                TELEPHONY_LOGI(
+                    "slotId: %{public}d get phone number from sim and save result: %{public}d", slotId, result);
+            });
+        }
         return TELEPHONY_ERR_SUCCESS;
     }
     int curSimId;
@@ -1232,10 +1239,11 @@ int32_t MultiSimController::GetSimTelephoneNumber(int32_t slotId, std::u16string
     telephoneNumber = Str8ToStr16(result);
     TELEPHONY_LOGI("impu result is empty:%{public}s, slotId:%{public}d", (telephoneNumber.empty() ? "true" : "false"),
         slotId);
-    if (!telephoneNumber.empty()) {
-        int32_t result = TELEPHONY_ERROR;
-        result = SetShowNumberToDB(slotId, telephoneNumber);
-        TELEPHONY_LOGI("slotId: %{public}d save impu phone number result: %{public}d", slotId, result);
+    if (!telephoneNumber.empty() && telephoneNumber != Str8ToStr16(localCacheInfo_[slotId].phoneNumber)) {
+        TelFFRTUtils::Submit([=]() {
+            int32_t ret = SetShowNumberToDB(slotId, telephoneNumber);
+            TELEPHONY_LOGI("slotId: %{public}d save impu phone number result: %{public}d", slotId, ret);
+        });
     }
     return TELEPHONY_ERR_SUCCESS;
 }
diff --git a/test/unittest/core_service_gtest/core_service_test.cpp b/test/unittest/core_service_gtest/core_service_test.cpp
index a229347298ebd6b3a432b3fd9d3f0d4a9104a86a..182a59d6ada52d13dbc9a99798884d7d6ff64044 100644
--- a/test/unittest/core_service_gtest/core_service_test.cpp
+++ b/test/unittest/core_service_gtest/core_service_test.cpp
@@ -610,6 +610,19 @@ HWTEST_F(CoreServiceTest, CoreService_DelIccDiallingNumbers_001, Function | Medi
     ASSERT_EQ(result, TELEPHONY_ERR_ILLEGAL_USE_OF_SYSTEM_API);
 }
 
+/**
+ * @tc.number   CoreService_GetSimTelephoneNumber_002
+ * @tc.name     test normal branch
+ * @tc.desc     Function test
+ */
+HWTEST_F(CoreServiceTest, CoreService_GetSimTelephoneNumber_002, Function | MediumTest | Level1)
+{
+    SecurityToken token;
+    std::u16string telephoneNumber = u"";
+    auto result = DelayedSingleton<CoreService>::GetInstance()->GetSimTelephoneNumber(1, telephoneNumber);
+    EXPECT_EQ(result, TELEPHONY_ERR_ILLEGAL_USE_OF_SYSTEM_API);
+}
+
 /**
  * @tc.number   CoreService_UpdateIccDiallingNumbers_001
  * @tc.name     test normal branch