diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
index fc77bc40..7da43977 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 
-version = "1.6.21"
+version = "1.6.22"
 
 android {
     compileSdkVersion 21
diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
index 52d8fb36..1fd4ff9b 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
@@ -110,6 +110,24 @@ String getProfileName() {
 
         final String packageName = context.getApplicationContext().getPackageName();
 
+        {
+            //中国移动
+            sCarrierMap.put("46000", " 中国移动");
+            sCarrierMap.put("46002", " 中国移动");
+            sCarrierMap.put("46007", " 中国移动");
+            sCarrierMap.put("46008", " 中国移动");
+
+            //中国联通
+            sCarrierMap.put("46001", " 中国联通");
+            sCarrierMap.put("46006", " 中国联通");
+            sCarrierMap.put("46009", " 中国联通");
+
+            //中国电信
+            sCarrierMap.put("46003", " 中国电信");
+            sCarrierMap.put("46005", " 中国电信");
+            sCarrierMap.put("46011", " 中国电信");
+        }
+
         try {
             final ApplicationInfo appInfo = context.getApplicationContext().getPackageManager()
                     .getApplicationInfo(packageName, PackageManager.GET_META_DATA);
@@ -211,16 +229,12 @@ String getProfileName() {
                     .TELEPHONY_SERVICE);
             String operatorString = telephonyManager.getSimOperator();
 
-            if (operatorString == null) {
-                // DO NOTHING
-            } else if (operatorString.equals("46000") || operatorString.equals("46002")) {
-                deviceInfo.put("$carrier", "中国移动");
-            } else if (operatorString.equals("46001")) {
-                deviceInfo.put("$carrier", "中国联通");
-            } else if (operatorString.equals("46003")) {
-                deviceInfo.put("$carrier", "中国电信");
-            } else {
-                deviceInfo.put("$carrier", "其他");
+            if (!TextUtils.isEmpty(operatorString)) {
+                if (sCarrierMap.containsKey(operatorString)) {
+                    deviceInfo.put("$carrier", sCarrierMap.get(operatorString));
+                } else {
+                    deviceInfo.put("$carrier", "其他");
+                }
             }
         }
 
@@ -1404,7 +1418,7 @@ private static void mergeJSONObject(final JSONObject source, JSONObject dest)
     static final int VTRACK_SUPPORTED_MIN_API = 16;
 
     // SDK版本
-    static final String VERSION = "1.6.21";
+    static final String VERSION = "1.6.22";
 
     static Boolean ENABLE_LOG = false;
 
@@ -1415,6 +1429,7 @@ private static void mergeJSONObject(final JSONObject source, JSONObject dest)
     // Maps each token to a singleton SensorsDataAPI instance
     private static final Map<Context, SensorsDataAPI> sInstanceMap = new HashMap<Context, SensorsDataAPI>();
     private static final SharedPreferencesLoader sPrefsLoader = new SharedPreferencesLoader();
+    private static final Map<String, String> sCarrierMap = new HashMap<>();
 
     // Configures
   /* SensorsAnalytics 地址 */
diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SystemInformation.java b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SystemInformation.java
index eb06e519..dd8f80b3 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SystemInformation.java
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SystemInformation.java
@@ -105,8 +105,12 @@ public Boolean isWifiConnected() {
                 .checkCallingOrSelfPermission(Manifest.permission.ACCESS_NETWORK_STATE)) {
             ConnectivityManager connManager =
                     (ConnectivityManager) this.mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
-            NetworkInfo wifiInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
-            ret = wifiInfo.isConnected();
+            if (connManager != null) {
+                NetworkInfo wifiInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
+                if (wifiInfo != null) {
+                    ret = wifiInfo.isConnected();
+                }
+            }
         }
 
         return ret;
diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
index db06b483..61d5e213 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
@@ -60,8 +60,11 @@ public static String networkType(Context context) {
         // Wifi
         ConnectivityManager manager = (ConnectivityManager)
                 context.getSystemService(Context.CONNECTIVITY_SERVICE);
-        if (manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting()) {
-            return "WIFI";
+        if (manager != null) {
+            NetworkInfo networkInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
+            if (networkInfo != null && networkInfo.isConnectedOrConnecting()) {
+                return "WIFI";
+            }
         }
 
         // Mobile network