diff --git a/src/main/com/sailthru/client/params/User.java b/src/main/com/sailthru/client/params/User.java
index 312c5d9..08bae19 100644
--- a/src/main/com/sailthru/client/params/User.java
+++ b/src/main/com/sailthru/client/params/User.java
@@ -103,8 +103,9 @@ public ApiAction getApiCall() {
 
     public enum OptOutType {
         OPT_OUT_TYPE_STOP("opt-out"),
-        OPT_OUT_TYPE_START("opt-in");
-
+        OPT_OUT_TYPE_START("opt-in"),
+        OPT_OUT_TYPE_PENDING("pending"),
+        OPT_OUT_TYPE_DOUBLE_OPT_IN("double-opt-in");
         public final String optOutTypeStr;
 
         OptOutType(String optOutTypeStr) {
diff --git a/src/test/com/sailthru/client/params/UserTest.java b/src/test/com/sailthru/client/params/UserTest.java
index ba1766a..fe4f4f2 100644
--- a/src/test/com/sailthru/client/params/UserTest.java
+++ b/src/test/com/sailthru/client/params/UserTest.java
@@ -118,7 +118,7 @@ public void testSetOptoutSmsStatus() {
         assertEquals(expected, result);
     }
 
-    public void testSetSmsMarketingStatus() {
+    public void testSetSmsMarketingStatusTypeStart() {
         user.setSmsMarketingStatus(User.OptOutType.OPT_OUT_TYPE_START);
 
         String expected = "{\"sms_marketing_status\":\"opt-in\"}";
@@ -126,7 +126,7 @@ public void testSetSmsMarketingStatus() {
         assertEquals(expected, result);
     }
 
-    public void testSetSmsTransactionalStatus() {
+    public void testSetSmsTransactionalStatusTypeStart() {
         user.setSmsTransactionalStatus(User.OptOutType.OPT_OUT_TYPE_START);
 
         String expected = "{\"sms_transactional_status\":\"opt-in\"}";
@@ -134,6 +134,54 @@ public void testSetSmsTransactionalStatus() {
         assertEquals(expected, result);
     }
 
+    public void testSetSmsMarketingStatusTypeStop() {
+        user.setSmsMarketingStatus(User.OptOutType.OPT_OUT_TYPE_STOP);
+
+        String expected = "{\"sms_marketing_status\":\"opt-out\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
+    public void testSetSmsTransactionalStatusTypeStop() {
+        user.setSmsTransactionalStatus(User.OptOutType.OPT_OUT_TYPE_STOP);
+
+        String expected = "{\"sms_transactional_status\":\"opt-out\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
+    public void testSetSmsMarketingStatusTypePending() {
+        user.setSmsMarketingStatus(User.OptOutType.OPT_OUT_TYPE_PENDING);
+
+        String expected = "{\"sms_marketing_status\":\"pending\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
+    public void testSetSmsTransactionalStatusTypePending() {
+        user.setSmsTransactionalStatus(User.OptOutType.OPT_OUT_TYPE_PENDING);
+
+        String expected = "{\"sms_transactional_status\":\"pending\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
+    public void testSetSmsMarketingStatusTypeDoubleOptIn() {
+        user.setSmsMarketingStatus(User.OptOutType.OPT_OUT_TYPE_DOUBLE_OPT_IN);
+
+        String expected = "{\"sms_marketing_status\":\"double-opt-in\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
+    public void testSetSmsTransactionalStatusTypeDoubleOptIn() {
+        user.setSmsTransactionalStatus(User.OptOutType.OPT_OUT_TYPE_DOUBLE_OPT_IN);
+
+        String expected = "{\"sms_transactional_status\":\"double-opt-in\"}";
+        String result = gson.toJson(user);
+        assertEquals(expected, result);
+    }
+
     public void testSetLogin() {
         Map<String, Object> login = new HashMap<String, Object>();
         login.put("ip", "123.456.789.0");