diff --git a/dom/system/gonk/ril_consts.js b/dom/system/gonk/ril_consts.js
index 9c3942898f2..5aa2526f34f 100644
--- a/dom/system/gonk/ril_consts.js
+++ b/dom/system/gonk/ril_consts.js
@@ -536,6 +536,51 @@ const PDU_PI_RESERVED            = 0x78;
 const PDU_FCS_OK          = 0x00;
 const PDU_FCS_UNSPECIFIED = 0xFF;
 
+// ST - Status
+// Bit 7..0 = 000xxxxx, short message transaction completed
+const PDU_ST_0_RECEIVED             = 0x00;
+const PDU_ST_0_FORWARDED_NO_CONFIRM = 0x01;
+const PDU_ST_0_REPLACED_BY_SC       = 0x02;
+const PDU_ST_0_RESERVED_BEGIN       = 0x03;
+const PDU_ST_0_SC_SPECIFIC_BEGIN    = 0x10;
+const PDU_ST_0_SC_SPECIFIC_END      = 0x1F;
+// Bit 7..0 = 001xxxxx, temporary error, SC still trying to transfer SM
+const PDU_ST_1_CONGESTION        = 0x20;
+const PDU_ST_1_SME_BUSY          = 0x21;
+const PDU_ST_1_SME_NO_RESPONSE   = 0x22;
+const PDU_ST_1_SERVICE_REJECTED  = 0x23;
+const PDU_ST_1_QOS_UNAVAILABLE   = 0x24;
+const PDU_ST_1_SME_ERROR         = 0x25;
+const PDU_ST_1_RESERVED_BEGIN    = 0x26;
+const PDU_ST_1_SC_SPECIFIC_BEGIN = 0x30;
+const PDU_ST_1_SC_SPECIFIC_END   = 0x3F;
+// Bit 7..0 = 010xxxxx, permanent error, SC is not making any more transfer
+// attempts
+const PDU_ST_2_RPC_ERROR                = 0x40;
+const PDU_ST_2_DEST_INCOMPATIBLE        = 0x41;
+const PDU_ST_2_CONNECTION_REJECTED      = 0x42;
+const PDU_ST_2_NOT_OBTAINABLE           = 0x43;
+const PDU_ST_2_QOS_UNAVAILABLE          = 0x44;
+const PDU_ST_2_INTERWORKING_UNAVALIABLE = 0x45;
+const PDU_ST_2_VALIDITY_EXPIRED         = 0x46;
+const PDU_ST_2_DELETED_BY_SME           = 0x47;
+const PDU_ST_2_DELETED_BY_SC            = 0x48;
+const PDU_ST_2_SM_MISSING               = 0x49;
+const PDU_ST_2_RESERVED_BEGIN           = 0x4A;
+const PDU_ST_2_SC_SPECIFIC_BEGIN        = 0x50;
+const PDU_ST_2_SC_SPECIFIC_END          = 0x5F;
+// Bit 7..0 = 011xxxxx, temporary error, SC is not making any more transfer
+// attempts
+const PDU_ST_3_CONGESTION        = 0x60;
+const PDU_ST_3_SME_BUSY          = 0x61;
+const PDU_ST_3_SME_NO_RESPONSE   = 0x62;
+const PDU_ST_3_SERVICE_REJECTED  = 0x63;
+const PDU_ST_3_QOS_UNAVAILABLE   = 0x64;
+const PDU_ST_3_SME_ERROR         = 0x65;
+const PDU_ST_3_RESERVED_BEGIN    = 0x66;
+const PDU_ST_3_SC_SPECIFIC_BEGIN = 0x70;
+const PDU_ST_3_SC_SPECIFIC_END   = 0x7F;
+
 // User Data max length in septets
 const PDU_MAX_USER_DATA_7BIT = 160;
 // User Data max length in octets
diff --git a/dom/system/gonk/ril_worker.js b/dom/system/gonk/ril_worker.js
index 2fb5cb910bb..22d3b32dcf1 100644
--- a/dom/system/gonk/ril_worker.js
+++ b/dom/system/gonk/ril_worker.js
@@ -1555,8 +1555,35 @@ let RIL = {
       return PDU_FCS_OK;
     }
 
+    let status = message.status;
+
+    // 3GPP TS 23.040 9.2.3.15 `The MS shall interpret any reserved values as
+    // "Service Rejected"(01100011) but shall store them exactly as received.`
+    if ((status >= 0x80)
+        || ((status >= PDU_ST_0_RESERVED_BEGIN)
+            && (status < PDU_ST_0_SC_SPECIFIC_BEGIN))
+        || ((status >= PDU_ST_1_RESERVED_BEGIN)
+            && (status < PDU_ST_1_SC_SPECIFIC_BEGIN))
+        || ((status >= PDU_ST_2_RESERVED_BEGIN)
+            && (status < PDU_ST_2_SC_SPECIFIC_BEGIN))
+        || ((status >= PDU_ST_3_RESERVED_BEGIN)
+            && (status < PDU_ST_3_SC_SPECIFIC_BEGIN))
+        ) {
+      status = PDU_ST_3_SERVICE_REJECTED;
+    }
+
+    // Pending. Waiting for next status report.
+    if ((status >>> 5) == 0x01) {
+      return PDU_FCS_OK;
+    }
+
     delete this._pendingSentSmsMap[message.messageRef];
 
+    if ((status >>> 5) != 0x00) {
+      // TODO: bug 727319 - Notify SMS send failures
+      return PDU_FCS_OK;
+    }
+
     if ((options.segmentMaxSeq > 1)
         && (options.segmentSeq < options.segmentMaxSeq)) {
       // Not last segment. Send next segment here.