diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 4807bc1b..fde20547 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -429,7 +429,7 @@ void StandAloneMode14a()
 						SpinDelay(300);
 					}
 				}
-				if (!iso14443a_select_card(uid, &hi14a_card[selected], &cuid))
+				if (!iso14443a_select_card(uid, &hi14a_card[selected], &cuid, 1))
 					continue;
 				else
 				{
diff --git a/armsrc/epa.c b/armsrc/epa.c
index 50c7d878..e22a5a88 100644
--- a/armsrc/epa.c
+++ b/armsrc/epa.c
@@ -526,7 +526,7 @@ int EPA_Setup()
 	// power up the field
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
 	// select the card
-	return_code = iso14443a_select_card(uid, &card_select_info, NULL);
+	return_code = iso14443a_select_card(uid, &card_select_info, NULL, 0);
 	if (return_code == 1) {
 		// send the PPS request
 		ReaderTransmit((uint8_t *)pps, sizeof(pps), NULL);
diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 5a602c79..f9a33158 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1698,7 +1698,7 @@ int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 /* performs iso14443a anticollision procedure
  * fills the uid pointer unless NULL
  * fills resp_data unless NULL */
-int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr) {
+int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, uint8_t no_rats) {
 	uint8_t wupa[]       = { 0x52 };  // 0x26 - REQA  0x52 - WAKE-UP
 	uint8_t sel_all[]    = { 0x93,0x20 };
 	uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
@@ -1821,7 +1821,8 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 	}
 
 	// non iso14443a compliant tag
-	if( (sak & 0x20) == 0) return 2; 
+	// some Mifare/CPU hybird card won't response to Mifare command any more if send RATS command.
+	if( no_rats || (sak & 0x20) == 0) return 2; 
 
 	// Request for answer to select
 	AppendCrc14443a(rats, 2);
@@ -1926,7 +1927,7 @@ void ReaderIso14443a(UsbCommand *c)
 		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 		if(!(param & ISO14A_NO_SELECT)) {
 			iso14a_card_select_t *card = (iso14a_card_select_t*)buf;
-			arg0 = iso14443a_select_card(NULL,card,NULL);
+			arg0 = iso14443a_select_card(NULL,card,NULL,0);
 			cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
 		}
 	}
@@ -2125,7 +2126,7 @@ void ReaderMifare(bool first_try, uint8_t blockNo, uint8_t keyType)
 			SpinDelay(100);
 		}
 		
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
+		if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Mifare: Can't select card");
 			continue;
 		}
diff --git a/armsrc/iso14443a.h b/armsrc/iso14443a.h
index ec99ab99..5bcb1fbf 100644
--- a/armsrc/iso14443a.h
+++ b/armsrc/iso14443a.h
@@ -82,7 +82,7 @@ extern int ReaderReceive(uint8_t *receivedAnswer, uint8_t *par);
 
 extern void iso14443a_setup(uint8_t fpga_minor_mode);
 extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data);
-extern int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *resp_data, uint32_t *cuid_ptr);
+extern int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *resp_data, uint32_t *cuid_ptr, uint8_t no_rats);
 extern void iso14a_set_trigger(bool enable);
 
 #endif /* __ISO14443A_H */
diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 36a6e8f5..88f9aae4 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -53,7 +53,7 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LED_C_OFF();
 
 	while (true) {
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
+		if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 			break;
 		};
@@ -100,7 +100,7 @@ void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){
 
 	clear_trace();
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	if(!iso14443a_select_card(NULL, NULL, NULL, 1)) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -135,7 +135,7 @@ void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 
 	clear_trace();
 
-	int len = iso14443a_select_card(NULL, NULL, NULL);
+	int len = iso14443a_select_card(NULL, NULL, NULL, 1);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);
 		OnError(1);
@@ -211,7 +211,7 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LED_C_OFF();
 
 	isOK = 1;
-	if(!iso14443a_select_card(uid, NULL, &cuid)) {
+	if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 		isOK = 0;
 		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 	}
@@ -275,7 +275,7 @@ void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 		return;
 	}
 
-	int len = iso14443a_select_card(NULL, NULL, NULL);
+	int len = iso14443a_select_card(NULL, NULL, NULL, 1);
 	if (!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%d)",len);
 		OnError(1);
@@ -377,7 +377,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	LED_C_OFF();
 
 	while (true) {
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 			break;
 		};
@@ -431,7 +431,7 @@ void MifareUWriteBlockCompat(uint8_t arg0, uint8_t *datain)
 	clear_trace();
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 
-	if(!iso14443a_select_card(uid, NULL, NULL)) {
+	if(!iso14443a_select_card(uid, NULL, NULL, 1)) {
 		if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -477,7 +477,7 @@ void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)
 
 	clear_trace();
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	if(!iso14443a_select_card(NULL, NULL, NULL, 1)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -536,7 +536,7 @@ void MifareUSetPwd(uint8_t arg0, uint8_t *datain){
 
 	clear_trace();
 
-	if(!iso14443a_select_card(NULL, NULL, NULL)) {
+	if(!iso14443a_select_card(NULL, NULL, NULL, 1)) {
 		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
 		OnError(0);
 		return;
@@ -672,7 +672,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");
 				rtr--;
 				continue;
@@ -746,7 +746,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 				continue;
 			}
 
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");
 				continue;
 			};
@@ -861,7 +861,7 @@ void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 			if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Halt error");
 		}
 
-		if(!iso14443a_select_card(uid, NULL, &cuid)) {
+		if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 			if (OLD_MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card");
 			break;
 		};
@@ -954,7 +954,7 @@ void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 	
 	bool isOK = true;
 
-	if(!iso14443a_select_card(uid, NULL, &cuid)) {
+	if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 		isOK = false;
 		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 	}
@@ -1054,7 +1054,7 @@ void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datai
 
 		// get UID from chip
 		if (workFlags & 0x01) {
-			if(!iso14443a_select_card(uid, NULL, &cuid)) {
+			if(!iso14443a_select_card(uid, NULL, &cuid, 1)) {
 				if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");
 				break;
 			};
@@ -1249,7 +1249,7 @@ void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 	clear_trace();
 
-	int len = iso14443a_select_card(uid, NULL, &cuid);
+	int len = iso14443a_select_card(uid, NULL, &cuid, 0);
 	if(!len) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");
 		OnError(1);