diff --git a/firmware/libboard/common/include/led.h b/firmware/libboard/common/include/led.h
index 339702d..1ade823 100644
--- a/firmware/libboard/common/include/led.h
+++ b/firmware/libboard/common/include/led.h
@@ -31,7 +31,8 @@
 	BLINK_200O_F		= 7,
 	BLINK_600O_F		= 8,
 	BLINK_CUSTOM		= 9,
-	BLINK_2F_O,
+	BLINK_2F_O		= 10,
+	BLINK_5O_5F		= 11,
 	_NUM_LED_BLINK
 };
 
diff --git a/firmware/libboard/common/source/led.c b/firmware/libboard/common/source/led.c
index 6772007..4822a6d 100644
--- a/firmware/libboard/common/source/led.c
+++ b/firmware/libboard/common/source/led.c
@@ -58,6 +58,10 @@
 	{ 0, 1 }
 };
 
+static const struct blink_state bs_5on_5off[] = {
+	{ 500, 1 }, { 500, 0 }
+};
+
 static const struct blink_state bs_3on_5off[] = {
 	{ 300, 1 }, { 500, 0 }
 };
@@ -107,6 +111,10 @@
 		.states = bs_on,
 		.size = ARRAY_SIZE(bs_on),
 	},
+	[BLINK_5O_5F] = {
+		.states = bs_5on_5off,
+		.size = ARRAY_SIZE(bs_5on_5off),
+	},
 	[BLINK_3O_5F] = {
 		.states = bs_3on_5off,
 		.size = ARRAY_SIZE(bs_3on_5off),
diff --git a/firmware/libboard/ngff_cardem/source/sim_switch.c b/firmware/libboard/ngff_cardem/source/sim_switch.c
index eb2d305..cc4860a 100644
--- a/firmware/libboard/ngff_cardem/source/sim_switch.c
+++ b/firmware/libboard/ngff_cardem/source/sim_switch.c
@@ -61,7 +61,7 @@
 	} else {
 		TRACE_INFO("%u: Use remote/emulated SIM\r\n", nr);
 		PIO_Configure(pins_cem, PIO_LISTSIZE(pins_cem));
-		led_blink(led, BLINK_ALWAYS_OFF);
+		led_blink(led, BLINK_5O_5F);
 	}
 
 	/* just power cycle the modem because this circumvents weird issues with unreliable signals */