diff --git a/src/main/java/cn/jpush/api/device/DeviceClient.java b/src/main/java/cn/jpush/api/device/DeviceClient.java
index 2ba3be8b..e88dff18 100644
--- a/src/main/java/cn/jpush/api/device/DeviceClient.java
+++ b/src/main/java/cn/jpush/api/device/DeviceClient.java
@@ -144,8 +144,6 @@ public DefaultResult updateDeviceTagAlias(String registrationId, String alias,
 
     public DefaultResult bindMobile(String registrationId, String mobile)
             throws APIConnectionException, APIRequestException {
-        Preconditions.checkNotNull(mobile, "The mobile must not be null.");
-
         if ( StringUtils.isEmpty(mobile) ) {
             // delete bind while mobile is empty.
             mobile = "";
diff --git a/src/test/java/cn/jpush/api/device/DeviceNormalRemoteTest.java b/src/test/java/cn/jpush/api/device/DeviceNormalRemoteTest.java
index b76d97ae..7ec38820 100644
--- a/src/test/java/cn/jpush/api/device/DeviceNormalRemoteTest.java
+++ b/src/test/java/cn/jpush/api/device/DeviceNormalRemoteTest.java
@@ -181,4 +181,19 @@ public void testBindMobile() throws APIConnectionException, APIRequestException
 		DefaultResult result = jpushClient.bindMobile(REGISTRATION_ID1, "13000000000");
 		assertTrue(result.isResultOK());
 	}
+
+	@Test
+	@TestOrder(order = 361)
+	public void testBindMobile_null() throws APIConnectionException, APIRequestException {
+		DefaultResult result = jpushClient.bindMobile(REGISTRATION_ID1, null);
+		assertTrue(result.isResultOK());
+	}
+
+	@Test
+	@TestOrder(order = 362)
+	public void testBindMobile_empty() throws APIConnectionException, APIRequestException {
+		DefaultResult result = jpushClient.bindMobile(REGISTRATION_ID1, "");
+		assertTrue(result.isResultOK());
+	}
+
 }