diff --git a/TODO-RELEASE b/TODO-RELEASE
index 5da461b6..fb357238 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -8,3 +8,4 @@
 # If any interfaces have been removed or changed since the last public release: c:r:0.
 #library	what			description / commit summary line
 simtrace2	API/ABI change		osmo_st2_transport new member
+simtrace2	API/ABI change		cardemu_usb_msg_config new member
diff --git a/firmware/libcommon/include/simtrace.h b/firmware/libcommon/include/simtrace.h
index a37ec4f3..aeb56ed8 100644
--- a/firmware/libcommon/include/simtrace.h
+++ b/firmware/libcommon/include/simtrace.h
@@ -124,4 +124,8 @@ extern void mode_cardemu_usart1_irq(void);
 void Timer_Init( void );
 void TC0_Counter_Reset( void );
 
+/* Sim presence pins */
+bool mode_cardemu_get_prensence_pol(uint8_t instance);
+void mode_cardemu_set_prensence_pol(uint8_t instance, bool high);
+
 #endif  /*  SIMTRACE_H  */
diff --git a/firmware/libcommon/include/simtrace_prot.h b/firmware/libcommon/include/simtrace_prot.h
index d1eb89bb..d95eb008 100644
--- a/firmware/libcommon/include/simtrace_prot.h
+++ b/firmware/libcommon/include/simtrace_prot.h
@@ -261,12 +261,21 @@ struct cardemu_usb_msg_error {
 /* enable/disable the generation of DO_STATUS on IRQ endpoint */
 #define CEMU_FEAT_F_STATUS_IRQ	0x00000001
 
+#define CEMU_CONFIG_PRES_POL_PRES_L 0x00
+#define CEMU_CONFIG_PRES_POL_PRES_H 0x01
+#define CEMU_CONFIG_PRES_POL_VALID 0x02
+
 /* SIMTRACE_MSGT_BD_CEMU_CONFIG */
 struct cardemu_usb_msg_config {
 	/* bit-mask of CEMU_FEAT_F flags */
 	uint32_t features;
 	/* the selected slot number (if an external mux is present) */
 	uint8_t slot_mux_nr;
+	/* Sim presence pin polarity. Bit 1 is valid bit. Bit 0 gpio value when sim present.
+	 * When sim is present, set sim_present gpio to high -> 0x03
+	 * When sim is present, set sim_present gpio to low -> 0x02
+	 */
+	uint8_t pres_pol;
 } __attribute__ ((packed));
 
 /***********************************************************************
diff --git a/firmware/libcommon/source/card_emu.c b/firmware/libcommon/source/card_emu.c
index e6907e66..e040eea7 100644
--- a/firmware/libcommon/source/card_emu.c
+++ b/firmware/libcommon/source/card_emu.c
@@ -24,6 +24,7 @@
 #include "trace.h"
 #include "iso7816_fidi.h"
 #include "card_emu.h"
+#include "simtrace.h"
 #include "simtrace_prot.h"
 #include "usb_buf.h"
 #include <osmocom/core/linuxlist.h>
@@ -1096,7 +1097,7 @@ static void card_emu_report_config(struct card_handle *ch)
 #else
 	cfg->slot_mux_nr = 0;
 #endif
-
+	cfg->pres_pol = mode_cardemu_get_prensence_pol(ch->num) | CEMU_CONFIG_PRES_POL_VALID;
 
 	usb_buf_upd_len_and_submit(msg);
 }
@@ -1270,6 +1271,11 @@ int card_emu_set_config(struct card_handle *ch, const struct cardemu_usb_msg_con
 	}
 #endif
 
+	if (scfg_len >= sizeof(uint32_t)+sizeof(uint8_t)+sizeof(uint8_t)) {
+		if (scfg->pres_pol & CEMU_CONFIG_PRES_POL_VALID)
+			mode_cardemu_set_prensence_pol(ch->num, scfg->pres_pol & CEMU_CONFIG_PRES_POL_PRES_H);
+	}
+
 	/* send back a report of our current configuration */
 	card_emu_report_config(ch);
 
diff --git a/firmware/libcommon/source/mode_cardemu.c b/firmware/libcommon/source/mode_cardemu.c
index a05840e7..60c14ea4 100644
--- a/firmware/libcommon/source/mode_cardemu.c
+++ b/firmware/libcommon/source/mode_cardemu.c
@@ -79,7 +79,10 @@ struct cardem_inst {
 	uint8_t ep_out;
 	uint8_t ep_in;
 	uint8_t ep_int;
+	/*! Pin to set when SIM is present/inserted (SIM presence pin). */
 	const Pin pin_insert;
+	/*! Invert the Pin polarity. When not inverted, the SIM pin_insert will be High, when a SIM is present. */
+	bool pin_insert_inverted;
 #ifdef DETECT_VCC_BY_ADC
 	uint32_t vcc_uv;
 #endif
@@ -113,7 +116,10 @@ struct cardem_inst cardem_inst[] = {
 		.ep_int = SIMTRACE_CARDEM_USB_EP_USIM1_INT,
 #ifdef PIN_SET_USIM1_PRES
 		.pin_insert = PIN_SET_USIM1_PRES,
-#endif
+#endif /* PIN_SET_USIM1_PRES */
+#ifdef PIN_SET_USIM1_PRES_INVERTED
+		.pin_insert_inverted = true,
+#endif /* PIN_SET_USIM1_PRES_INVERTED */
 	},
 #ifdef CARDEMU_SECOND_UART
 	{
@@ -128,7 +134,10 @@ struct cardem_inst cardem_inst[] = {
 		.ep_int = SIMTRACE_CARDEM_USB_EP_USIM2_INT,
 #ifdef PIN_SET_USIM2_PRES
 		.pin_insert = PIN_SET_USIM2_PRES,
-#endif
+#endif /* PIN_SET_USIM2_PRES */
+#ifdef PIN_SET_USIM2_PRES_INVERTED
+		.pin_insert_inverted = true,
+#endif /* PIN_SET_USIM2_PRES_INVERTED */
 	},
 #endif
 };
@@ -700,7 +709,7 @@ static void process_card_insert(struct cardem_inst *ci, bool card_insert)
 	TRACE_INFO("%u: set card_insert to %s\r\n", ci->num, card_insert ? "INSERTED" : "REMOVED");
 
 #ifdef HAVE_BOARD_CARDINSERT
-	board_set_card_insert(ci, card_insert);
+	board_set_card_insert(ci, card_insert ^ ci->pin_insert_inverted);
 #else
 	if (!ci->pin_insert.pio) {
 		TRACE_INFO("%u: skipping unsupported card_insert to %s\r\n",
@@ -708,7 +717,7 @@ static void process_card_insert(struct cardem_inst *ci, bool card_insert)
 		return;
 	}
 
-	if (card_insert)
+	if (card_insert ^ ci->pin_insert_inverted)
 		PIO_Set(&ci->pin_insert);
 	else
 		PIO_Clear(&ci->pin_insert);
@@ -962,3 +971,25 @@ void mode_cardemu_run(void)
 		process_any_usb_commands(queue, ci);
 	}
 }
+
+void mode_cardemu_set_prensence_pol(uint8_t instance, bool high)
+{
+	struct cardem_inst *ci;
+
+	if (instance >= ARRAY_SIZE(cardem_inst))
+		return;
+
+	ci = &cardem_inst[instance];
+	ci->pin_insert_inverted = !high;
+}
+
+bool mode_cardemu_get_prensence_pol(uint8_t instance)
+{
+	struct cardem_inst *ci;
+
+	if (instance >= ARRAY_SIZE(cardem_inst))
+		return false;
+
+	ci = &cardem_inst[instance];
+	return !ci->pin_insert_inverted;
+}