diff --git a/ThreadedGSM.h b/ThreadedGSM.h
index 68516f6..ab35afe 100644
--- a/ThreadedGSM.h
+++ b/ThreadedGSM.h
@@ -198,6 +198,8 @@ public:
 			Intervals[i] = 0;
 
 		job = state = requests = 0;
+        //SMSo.Text.reserve(150);
+        //SMSi.Text.reserve(150);
 	}
 
 	~ThreadedGSM(){};
@@ -302,6 +304,13 @@ public:
 		SMSo.Text = Text;
 	}
 
+    void sendSMS(String& Number, char *Text)
+    {
+        requests |= (REQ_OUTBOX);
+        SMSo.Number = Number;
+        SMSo.Text = Text;
+    }
+
 protected:
 private:
 
@@ -349,7 +358,7 @@ private:
 			case STARTUP_CHK_CPIN:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
-					if(dte.getBuffer().indexOf("+CPIN: READY") != -1)
+					if(dte.getBuffer().indexOf(F("+CPIN: READY")) != -1)
 					{
 						dte.SendCommand("AT+CREG?\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
 						state = STARTUP_CHK_CREG;
@@ -363,7 +372,7 @@ private:
 			case STARTUP_CHK_CREG:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
-					if((dte.getBuffer().indexOf(",1") >= 0) || (dte.getBuffer().indexOf(",5") >= 0))
+					if((dte.getBuffer().indexOf(F(",1")) >= 0) || (dte.getBuffer().indexOf(F(",5")) >= 0))
 					{
 						dte.SendCommand("AT+CLTS=1\r", THREADEDGSM_AT_TIMEOUT, "OK\r");
 						state = STARTUP_CHK_CLTS;
@@ -412,18 +421,18 @@ private:
 				state = CLOCK_VERIFY;
 				break;
 			case CLOCK_VERIFY:
-				int index = dte.getBuffer().indexOf("+CCLK: ");
+				int index = dte.getBuffer().indexOf(F("+CCLK: "));
 				if(index >= 0)
 				{
 					// parse clock
 					index+=8;
 					int endindex;
-					endindex = dte.getBuffer().indexOf("+", index);
+					endindex = dte.getBuffer().indexOf(F("+"), index);
 					if(endindex >= 0)
 						clockTime = dte.getBuffer().substring(index, endindex);
 					else
 					{
-						endindex = dte.getBuffer().indexOf("-", index);
+						endindex = dte.getBuffer().indexOf(F("-"), index);
 						if(endindex >= 0)
 							clockTime = dte.getBuffer().substring(index, endindex);
 					}
@@ -460,7 +469,7 @@ private:
 				state = SIGNAL_VERIFY;
 				break;
 			case SIGNAL_VERIFY:
-				int index = dte.getBuffer().indexOf("+CSQ: ");
+				int index = dte.getBuffer().indexOf(F("+CSQ: "));
 				if(index >= 0)
 				{
 					// parse signal
@@ -494,17 +503,17 @@ private:
 				state = BATTERY_VERIFY;
 				break;
 			case BATTERY_VERIFY:
-				int index = dte.getBuffer().indexOf("+CBC:");
+				int index = dte.getBuffer().indexOf(F("+CBC:"));
 				if(index >= 0)
 				{
 					BatteryInfo BattInfo;
 					// parse battery level
 					String buffer = dte.getBuffer().substring(index);
-    			String buffer2 = buffer.substring(buffer.indexOf(",") + 1);
+    			String buffer2 = buffer.substring(buffer.indexOf(F(",")) + 1);
     			buffer = buffer2;
-    			BattInfo.Percent = buffer2.substring(0, buffer2.indexOf(",")).toInt(); // converts the result to interger
-    			buffer2 = buffer.substring(buffer.indexOf(",") + 1);
-    			BattInfo.Voltage = buffer2.substring(0, buffer2.indexOf("\r")).toInt(); // converts the result to interger
+    			BattInfo.Percent = buffer2.substring(0, buffer2.indexOf(F(","))).toInt(); // converts the result to interger
+    			buffer2 = buffer.substring(buffer.indexOf(F(",")) + 1);
+    			BattInfo.Voltage = buffer2.substring(0, buffer2.indexOf(F("\r"))).toInt(); // converts the result to interger
 					if(this->configuration.battery != NULL)
 						this->configuration.battery(*this, BattInfo);
 				}
@@ -558,10 +567,10 @@ private:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
 					//fetch index
-					int indexStart = dte.getBuffer().indexOf("+CMGL: ");
+					int indexStart = dte.getBuffer().indexOf(F("+CMGL: "));
 					if (indexStart >= 0)
 					{
-						Message.Index = dte.getBuffer().substring(indexStart + 7, dte.getBuffer().indexOf(",")).toInt();
+						Message.Index = dte.getBuffer().substring(indexStart + 7, dte.getBuffer().indexOf(F(","))).toInt();
 						if(Message.Index != 0)
 						{
 							dte.Delay(2000);
@@ -594,22 +603,22 @@ private:
 			case READ_CHK_CMGR:
 				if(dte.getResult() == DTE::EXPECT_RESULT)
 				{
-					int indexStart = dte.getBuffer().indexOf("+CMGR: ");
+					int indexStart = dte.getBuffer().indexOf(F("+CMGR: "));
 					if(indexStart >= 0)
 					{
-						int indexStartPDU = dte.getBuffer().indexOf("\r\n", indexStart);
+						int indexStartPDU = dte.getBuffer().indexOf(F("\r\n"), indexStart);
 						if (indexStartPDU >= 0)
 						{
 							indexStartPDU+=2;
-							int indexEndPDU = dte.getBuffer().indexOf("\r", indexStartPDU);
+							int indexEndPDU = dte.getBuffer().indexOf(F("\r"), indexStartPDU);
 							if(indexEndPDU >= 0)
 								SMSi.Text = dte.getBuffer().substring(indexStartPDU, indexEndPDU);
 						}
-						indexStartPDU = dte.getBuffer().indexOf(",\"", indexStart);
+						indexStartPDU = dte.getBuffer().indexOf(F(",\""), indexStart);
 						if (indexStartPDU >= 0)
 						{
 							indexStartPDU += 2;
-							int indexEndPDU = dte.getBuffer().indexOf("\",", indexStartPDU);
+							int indexEndPDU = dte.getBuffer().indexOf(F("\","), indexStartPDU);
 							if (indexEndPDU >= 0)
 								SMSi.Number = dte.getBuffer().substring(indexStartPDU, indexEndPDU);
 						}
@@ -642,6 +651,8 @@ private:
 	void Outbox()
 	{
 		String CMD;
+
+        //CMD.reserve(200);
 		int lastState = state;
 		switch(state)
 		{