diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index 81b991b0..136f8056 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -259,6 +259,10 @@ public class AppMaster {
                 ex.printStackTrace();
             }
 
+            // if (BuildConfig.DEBUG) {
+            postParams.add(new Pair<String, String>("slot", Integer.toString(mService.getActiveSlotIndex())));
+            // }
+
             try {
                 String battery = getBatteryVoltage() + "V/" + getChargingBatteryVoltage() + "V";
                 postParams.add(new Pair<String, String>("battery", battery));
@@ -370,6 +374,7 @@ public class AppMaster {
             if (items[11] > 0) {
                 stats.add(new Pair<String, String>("i1RebootTimesWk", Integer.toString(items[11])));
             }
+
         } catch (Exception ex) {
             ex.printStackTrace();
         }
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index caee4379..e3c8bdc1 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -896,6 +896,18 @@ public class MpMasterService extends Service {
         context.startActivity(LaunchIntent);
     }
 
+    public int getActiveSlotIndex() {
+        Context context = getApplicationContext();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+
+            SubscriptionManager subscriptionManager = (SubscriptionManager) getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);
+            int activeSubId = SubscriptionManager.getActiveDataSubscriptionId();
+            int activeSlotIdx = SubscriptionManager.getSlotIndex(activeSubId);
+            return activeSlotIdx + 1;
+        }
+        return 0;
+    }
+
     public void selectSimCard(int num) {
         logger.info("Try to Switch To SimCard: " + Integer.toString(num));