diff --git a/host/src/simtrace2-remsim.c b/host/src/simtrace2-remsim.c
index 03d11dff..d51f0812 100644
--- a/host/src/simtrace2-remsim.c
+++ b/host/src/simtrace2-remsim.c
@@ -432,9 +432,7 @@ int main(int argc, char **argv)
 
 		if (!skip_atr) {
 			/* set the ATR */
-			uint8_t real_atr[] = {  0x3B, 0x9F, 0x96, 0x80, 0x1F, 0xC7, 0x80, 0x31,
-						0xA0, 0x73, 0xBE, 0x21, 0x13, 0x67, 0x43, 0x20,
-						0x07, 0x18, 0x00, 0x00, 0x01, 0xA5 };
+			uint8_t real_atr[] = {  0x3B, 0x00 }; // the simplest ATR
 			atr_update_csum(real_atr, sizeof(real_atr));
 			osmo_st2_cardem_request_set_atr(ci, real_atr, sizeof(real_atr));
 		}