diff --git a/src/org/thoughtcrime/securesms/mms/LegacyMmsConnection.java b/src/org/thoughtcrime/securesms/mms/LegacyMmsConnection.java
index ef3bc6ea2f..f7ae4a2611 100644
--- a/src/org/thoughtcrime/securesms/mms/LegacyMmsConnection.java
+++ b/src/org/thoughtcrime/securesms/mms/LegacyMmsConnection.java
@@ -19,6 +19,7 @@ package org.thoughtcrime.securesms.mms;
 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
+import android.support.annotation.Nullable;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -43,6 +44,9 @@ import org.thoughtcrime.securesms.util.Conversions;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.Util;
 import org.whispersystems.libaxolotl.util.guava.Optional;
+import com.google.i18n.phonenumbers.PhoneNumberUtil;
+import com.google.i18n.phonenumbers.NumberParseException;
+import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber;
 
 import java.io.BufferedInputStream;
 import java.io.ByteArrayOutputStream;
@@ -194,7 +198,9 @@ public abstract class LegacyMmsConnection {
   }
 
   protected List<Header> getBaseHeaders() {
-    final String number = TelephonyUtil.getManager(context).getLine1Number();
+    final String                number    = TelephonyUtil.getManager(context).getLine1Number(); ;
+    final Optional<BasicHeader> mdnHeader = getVerizonMdnHeader(number);
+
     return new LinkedList<Header>() {{
       add(new BasicHeader("Accept", "*/*, application/vnd.wap.mms-message, application/vnd.wap.sic"));
       add(new BasicHeader("x-wap-profile", "http://www.google.com/oha/rdf/ua-profile-kila.xml"));
@@ -203,10 +209,28 @@ public abstract class LegacyMmsConnection {
       if (!TextUtils.isEmpty(number)) {
         add(new BasicHeader("x-up-calling-line-id", number));
         add(new BasicHeader("X-MDN", number));
+        if (mdnHeader.isPresent()) add(mdnHeader.get());
       }
     }};
   }
 
+  private Optional<BasicHeader> getVerizonMdnHeader(@Nullable String number) {
+    if (TextUtils.isEmpty(number)) return Optional.absent();
+
+    try {
+      PhoneNumberUtil phoneNumberUtil = PhoneNumberUtil.getInstance();
+      PhoneNumber     phoneNumber     = phoneNumberUtil.parse(number, null);
+      String          mdnNumber       = phoneNumberUtil.getNationalSignificantNumber(phoneNumber);
+
+      return Optional.of(new BasicHeader("x-vzw-mdn", mdnNumber));
+    } catch (NumberParseException e) {
+      Log.w(TAG, e);
+      return Optional.absent();
+    }
+
+
+  }
+
   public static class Apn {
 
     public static Apn EMPTY = new Apn("", "", "", "", "");