diff --git a/code/application/source/sf_app/code/include/sf_hal_ttyusb.h b/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
old mode 100644
new mode 100755
index d746d8ad8..1a3d6c35d
--- a/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
+++ b/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
@@ -65,7 +65,7 @@ SINT32 sf_hal_ttyusb2_init(void);
 
 SINT32 sf_hal_ttyusb2_write(SF_CHAR *sendBuf, SINT32 dataLen);
 
-SINT32 sf_hal_ttyusb2_read(SF_CHAR *recvBuf, SINT32 dataLen);
+SINT32 sf_hal_ttyusb2_read(SF_CHAR *recvBuf, SINT32 waitMs);
 
 SINT32 sf_hal_ttyusb2_deinit(void);
 
@@ -73,7 +73,7 @@ SINT32 sf_hal_uart_init(void);
 
 SINT32 sf_hal_uart_write(SF_CHAR *sendBuf, SINT32 dataLen);
 
-SINT32 sf_hal_uart_read(SF_CHAR *recvBuf, SINT32 dataLen);
+SINT32 sf_hal_uart_read(SF_CHAR *recvBuf, SINT32 waitMs);
 
 SINT32 sf_hal_uart_deinit(void);
 
diff --git a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
old mode 100644
new mode 100755
index 871722305..755e51fb5
--- a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
+++ b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
@@ -252,32 +252,36 @@ static SINT32 hal_ttyusb_read(SINT32 fd, SF_CHAR *recvBuf, SINT32 waitTime)
 	// if(waitTime > 0)
 	// 	sf_sleep_ms(waitTime);
 	
-	while(waitTime--){
+	//while(waitTime--)
+    {
 		
 		
 		FD_ZERO(&read_fds);
 		FD_SET(fd, &read_fds);
 	
 		TimeoutVal.tv_sec  = 0;
-		TimeoutVal.tv_usec = 10000;
+		TimeoutVal.tv_usec = 200000;
 
 		s32ret = select(fd + 1, &read_fds, NULL, NULL, &TimeoutVal);
 		if (s32ret > 0) {
 			if (FD_ISSET(fd, &read_fds)) {
-				s32ret = read(fd, recvBuf, 580);
+				s32ret = read(fd, recvBuf, (GPRS_INFO_LINE_MAX-1));
 				if (s32ret > 0) {
-					break;
+					//break;
+                    return SF_SUCCESS;
 				}
 			}
 			FD_CLR(fd, &read_fds);
 		} 
 		else if (s32ret < 0) {
 			//MLOGE(" select failed\n");
-			continue;
+            return SF_FAILURE;
+			//continue;
 		} 
 		else if (0 == s32ret) {
 			//MLOGW("FIFO select timeout [%d]\n",waitTime);
-			continue;
+            return SF_FAILURE;
+			//continue;
 		}
 		
 	}
@@ -356,9 +360,9 @@ SINT32 sf_hal_ttyusb2_write(SF_CHAR *sendBuf, SINT32 dataLen)
 {
 	return hal_ttyusb_write(TtyUSB2Fd,sendBuf,dataLen);
 }
-SINT32 sf_hal_ttyusb2_read(SF_CHAR *recvBuf, SINT32 dataLen)
+SINT32 sf_hal_ttyusb2_read(SF_CHAR *recvBuf, SINT32 waitMs)
 {
-	return hal_ttyusb_read(TtyUSB2Fd,recvBuf,dataLen);
+	return hal_ttyusb_read(TtyUSB2Fd, recvBuf, waitMs);
 }
 SINT32 sf_hal_ttyusb2_deinit(void)
 {
@@ -397,9 +401,9 @@ SINT32 sf_hal_uart_write(SF_CHAR *sendBuf, SINT32 dataLen)
 {
 	return hal_ttyusb_write(UartFd,sendBuf,dataLen);
 }
-SINT32 sf_hal_uart_read(SF_CHAR *recvBuf, SINT32 dataLen)
+SINT32 sf_hal_uart_read(SF_CHAR *recvBuf, SINT32 waitMs)
 {
-	return hal_ttyusb_read(UartFd,recvBuf,dataLen);
+	return hal_ttyusb_read(UartFd, recvBuf, waitMs);
 }
 SINT32 sf_hal_uart_deinit(void)
 {