diff --git a/media/libaudioclient/ToneGenerator.cpp b/media/libaudioclient/ToneGenerator.cpp
index ea856af..435cfa2 100644
--- a/media/libaudioclient/ToneGenerator.cpp
+++ b/media/libaudioclient/ToneGenerator.cpp
@@ -787,6 +787,18 @@
                         { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
           .repeatCnt = ToneGenerator::TONEGEN_INF,
           .repeatSegment = 0 },                              // TONE_AUSTRALIA_CONGESTION
+        { .segments = { { .duration = 750, .waveFreq = { 425, 0 }, 0, 0 },
+                        { .duration = 750, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
+          .repeatCnt = ToneGenerator::TONEGEN_INF,
+          .repeatSegment = 0 },                              // TONE_SG_BUSY
+        { .segments = { { .duration = 400, .waveFreq = { 401, 425, 449, 0 }, 0, 0 },
+                        { .duration = 200, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 400, .waveFreq = { 401, 425, 449, 0 }, 0, 0 },
+                        { .duration = 2000, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
+          .repeatCnt = ToneGenerator::TONEGEN_INF,
+          .repeatSegment = 0 },                              // TONE_SG_RINGTONE
 };
 
 // Used by ToneGenerator::getToneForRegion() to convert user specified supervisory tone type
@@ -831,6 +843,16 @@
             TONE_SUP_ERROR,             // TONE_SUP_ERROR
             TONE_AUSTRALIA_CALL_WAITING,// TONE_SUP_CALL_WAITING
             TONE_AUSTRALIA_RINGTONE     // TONE_SUP_RINGTONE
+        },
+        {   // SINGAPORE
+            TONE_SUP_DIAL,               // TONE_SUP_DIAL
+            TONE_SG_BUSY,                // TONE_SUP_BUSY
+            TONE_SUP_CONGESTION,         // TONE_SUP_CONGESTION
+            TONE_SUP_RADIO_ACK,          // TONE_SUP_RADIO_ACK
+            TONE_SUP_RADIO_NOTAVAIL,     // TONE_SUP_RADIO_NOTAVAIL
+            TONE_SUP_ERROR,              // TONE_SUP_ERROR
+            TONE_SUP_CALL_WAITING,       // TONE_SUP_CALL_WAITING
+            TONE_SG_RINGTONE             // TONE_SUP_RINGTONE
         }
 };
 
@@ -889,6 +911,8 @@
         mRegion = GB;
     } else if (strstr(value, "au") != NULL) {
         mRegion = AUSTRALIA;
+    } else if (strstr(value, "sg") != NULL) {
+        mRegion = SINGAPORE;
     } else {
         mRegion = CEPT;
     }
diff --git a/media/libaudioclient/include/media/ToneGenerator.h b/media/libaudioclient/include/media/ToneGenerator.h
index 3112edb..d362c68 100644
--- a/media/libaudioclient/include/media/ToneGenerator.h
+++ b/media/libaudioclient/include/media/ToneGenerator.h
@@ -177,7 +177,7 @@
 
 
     // Region specific tones.
-    // These supervisory tones are different depending on the region (USA/CANADA, JAPAN, rest of the world).
+    // These supervisory tones are different depending on the region (USA/CANADA, JAPAN, Singapore, rest of the world).
     // When a tone in the range [FIRST_SUP_TONE, LAST_SUP_TONE] is requested, the region is determined
     // from system property gsm.operator.iso-country and the proper tone descriptor is selected with the
     // help of sToneMappingTable[]
@@ -203,6 +203,9 @@
         TONE_AUSTRALIA_BUSY,        // Busy tone: 425 Hz repeated in a 0.375s on, 0.375s off pattern.
         TONE_AUSTRALIA_CALL_WAITING,// Call waiting tone: 425Hz tone repeated in a 0.2s on, 0.2s off, 0.2s on, 4.4s off pattern.
         TONE_AUSTRALIA_CONGESTION,  // Congestion tone: 425Hz tone repeated in a 0.375s on, 0.375s off pattern
+        // SINGAPORE Supervisory tones
+        TONE_SG_BUSY,               // Busy tone: 425 Hz, 750ms ON, 750ms OFF...
+        TONE_SG_RINGTONE,           // Ring Tone: 425 Hz tone modulated with 24 Hz, 400ms ON, 200ms OFF, 400ms ON, 2s OFF...
         NUM_ALTERNATE_TONES
     };
 
@@ -211,6 +214,7 @@
         JAPAN,
         GB,
         AUSTRALIA,
+        SINGAPORE,
         CEPT,
         NUM_REGIONS
     };