diff --git a/utils/osmo-sim-test.c b/utils/osmo-sim-test.c
new file mode 100644
index 0000000..5fbb03f
--- /dev/null
+++ b/utils/osmo-sim-test.c
@@ -0,0 +1,370 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/sim/sim.h>
+#include <osmocom/gsm/tlv.h>
+
+
+
+
+
+
+
+/* 11.1.1 */
+static struct msgb *_select_file(struct osim_chan_hdl *st, uint8_t p1, uint8_t p2,
+			const uint8_t *data, uint8_t data_len)
+{
+	struct msgb *msg, *resp;
+	char *dst;
+
+	msg = osim_new_apdumsg(0x00, 0xA4, p1, p2, data_len, 256);
+	dst = msgb_put(msg, data_len);
+	memcpy(dst, data, data_len);
+
+	osim_transceive_apdu(st, msg);
+
+	return msg;
+}
+
+/* 11.1.1 */
+static struct msgb *select_adf(struct osim_chan_hdl *st, const uint8_t *adf, uint8_t adf_len)
+{
+	int sw;
+
+	return _select_file(st, 0x04, 0x04, adf,adf_len);
+}
+
+/* 11.1.1 */
+static struct msgb *select_file(struct osim_chan_hdl *st, uint16_t fid)
+{
+	uint16_t cfid = htons(fid);
+
+	return _select_file(st, 0x00, 0x04, (uint8_t *)&cfid, 2);
+}
+
+/* 11.1.9 */
+static int verify_pin(struct osim_chan_hdl *st, uint8_t pin_nr, uint8_t *pin)
+{
+	struct msgb *msg;
+	char *pindst;
+	int sw;
+
+	if (strlen(pin) > 8)
+		return -EINVAL;
+
+	msg = osim_new_apdumsg(0x00, 0x20, 0x00, pin_nr, 8, 0);
+	pindst = msgb_put(msg, 8);
+	memset(pindst, 0xFF, 8);
+	strncpy(pindst, pin, strlen(pin));
+
+	return osim_transceive_apdu(st, msg);
+}
+
+/* 11.1.5 */
+static struct msgb *read_record_nr(struct osim_chan_hdl *st, uint8_t rec_nr, uint16_t rec_size)
+{
+	struct msgb *msg;
+
+	msg = osim_new_apdumsg(0x00, 0xB2, rec_nr, 0x04, 0, rec_size);
+
+	osim_transceive_apdu(st, msg);
+
+	return msg;
+}
+
+/* 11.1.6 */
+static struct msgb *update_record_nr(struct osim_chan_hdl *st, uint8_t rec_nr,
+				     const uint8_t *data, uint16_t rec_size)
+{
+	struct msgb *msg;
+	uint8_t *cur;
+
+	msg = osim_new_apdumsg(0x00, 0xDC, rec_nr, 0x04, rec_size, 0);
+	cur = msgb_put(msg, rec_size);
+	memcpy(cur, data, rec_size);
+
+	osim_transceive_apdu(st, msg);
+
+	return msg;
+}
+
+/* 11.1.3 */
+static struct msgb *read_binary(struct osim_chan_hdl *st, uint16_t offset, uint16_t len)
+{
+	struct msgb *msg;
+
+	if (offset > 0x7fff || len > 256)
+		return NULL;
+
+	msg = osim_new_apdumsg(0x00, 0xB0, offset >> 8, offset & 0xff, 0, len & 0xff);
+
+	osim_transceive_apdu(st, msg);
+
+	return msg;
+}
+
+/* 11.1.4 */
+static struct msgb *update_binary(struct osim_chan_hdl *st, uint16_t offset,
+				  const uint8_t *data, uint16_t len)
+{
+	struct msgb *msg;
+	uint8_t *cur;
+
+	if (offset > 0x7fff || len > 256)
+		return NULL;
+
+	msg = osim_new_apdumsg(0x00, 0xD6, offset >> 8, offset & 0xff, len & 0xff, 0);
+	cur = msgb_put(msg, len);
+	memcpy(cur, data, len);
+
+	osim_transceive_apdu(st, msg);
+
+	return msg;
+}
+
+static int dump_fcp_template(struct tlv_parsed *tp)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tp->lv); i++) {
+		if (TLVP_PRESENT(tp, i))
+			printf("Tag 0x%02x (%s): %s\n", i,
+				get_value_string(ts102221_fcp_vals, i),
+				osmo_hexdump(TLVP_VAL(tp, i), TLVP_LEN(tp, i)));
+	}
+
+	return 0;
+}
+
+static int dump_fcp_template_msg(struct msgb *msg)
+{
+	struct tlv_parsed tp;
+	int rc;
+
+	rc = tlv_parse(&tp, &ts102221_fcp_tlv_def, msgb_apdu_de(msg)+2, msgb_apdu_le(msg)-4, 0, 0);
+	if (rc < 0)
+		return rc;
+
+	return dump_fcp_template(&tp);
+}
+
+struct osim_fcp_fd_decoded {
+	enum osim_file_type type;
+	enum osim_ef_type ef_type;
+	uint16_t rec_len;
+	uint8_t num_rec;
+};
+
+static const enum osim_file_type iso2ftype[8] = {
+	[0] = TYPE_EF,
+	[1] = TYPE_EF_INT,
+	[7] = TYPE_DF,
+};
+
+static const enum osim_ef_type iso2eftype[8] = {
+	[1] = EF_TYPE_TRANSP,
+	[2] = EF_TYPE_RECORD_FIXED,
+	[6] = EF_TYPE_RECORD_CYCLIC,
+};
+
+static int osim_fcp_fd_decode(struct osim_fcp_fd_decoded *ofd, const uint8_t *fcp, int fcp_len)
+{
+	memset(ofd, 0, sizeof(*ofd));
+
+	if (fcp_len != 2 && fcp_len != 5)
+		return -EINVAL;
+
+	ofd->type = iso2ftype[(fcp[0] >> 3) & 7];
+	if (ofd->type != TYPE_DF)
+		ofd->ef_type = iso2eftype[fcp[0] & 7];
+
+	if (fcp[1] != 0x21)
+		return -EINVAL;
+
+	if (fcp_len >= 5) {
+		ofd->rec_len = ntohs(*(uint16_t *)(fcp+2));
+		ofd->num_rec = fcp[4];
+	}
+
+	return 0;
+}
+
+extern struct osim_card_profile *osim_cprof_usim(void *ctx);
+
+static struct msgb *try_select_adf_usim(struct osim_chan_hdl *st)
+{
+	struct tlv_parsed tp;
+	struct osim_fcp_fd_decoded ofd;
+	struct msgb *msg, *msg2;
+	uint8_t *cur;
+	int rc, i;
+
+	msg = select_file(st, 0x2f00);
+	rc = tlv_parse(&tp, &ts102221_fcp_tlv_def, msgb_apdu_de(msg)+2, msgb_apdu_le(msg)-4, 0, 0);
+	if (rc < 0)
+		return NULL;
+
+	dump_fcp_template(&tp);
+
+	if (!TLVP_PRESENT(&tp, UICC_FCP_T_FILE_DESC) ||
+	    TLVP_LEN(&tp, UICC_FCP_T_FILE_DESC) < 5) {
+		msgb_free(msg);
+		return NULL;
+	}
+
+	rc = osim_fcp_fd_decode(&ofd, TLVP_VAL(&tp, UICC_FCP_T_FILE_DESC),
+				TLVP_LEN(&tp, UICC_FCP_T_FILE_DESC));
+	if (rc < 0) {
+		msgb_free(msg);
+		return NULL;
+	}
+
+	if (ofd.type != TYPE_EF || ofd.ef_type != EF_TYPE_RECORD_FIXED) {
+		msgb_free(msg);
+		return NULL;
+	}
+
+	msgb_free(msg);
+
+	printf("ofd rec_len = %u, num_rec = %u\n", ofd.rec_len, ofd.num_rec);
+
+	for (i = 0; i < ofd.num_rec; i++) {
+		msg = read_record_nr(st, i+1, ofd.rec_len);
+		if (!msg)
+			return NULL;
+
+		cur = msgb_apdu_de(msg);
+		if (msgb_apdu_le(msg) < 5) {
+			msgb_free(msg);
+			return NULL;
+		}
+
+		if (cur[0] != 0x61 || cur[1] < 0x03 || cur[1] > 0x7f ||
+		    cur[2] != 0x4F || cur[3] < 0x01 || cur[3] > 0x10) {
+			msgb_free(msg);
+			return NULL;
+		}
+
+		/* FIXME: actually check if it is an AID that we support, or
+		 * iterate until we find one that we support */
+
+		msg2 = select_adf(st, cur+4, cur[3]);
+
+		/* attach the USIM profile, FIXME: do this based on AID match */
+		st->card->prof = osim_cprof_usim(st->card);
+		st->cwd = osim_file_find_name(st->card->prof->mf, "ADF.USIM");
+
+		msgb_free(msg);
+
+		return msg2;
+	}
+
+	return NULL;
+}
+
+static int dump_file(struct osim_chan_hdl *chan, uint16_t fid)
+{
+	struct tlv_parsed tp;
+	struct osim_fcp_fd_decoded ffdd;
+	struct msgb *msg;
+	int rc, i;
+
+	msg = select_file(chan, fid);
+	if (!msg)
+		return -EIO;
+	if (msgb_apdu_sw(msg) != 0x9000)
+		goto out;
+
+	rc = tlv_parse(&tp, &ts102221_fcp_tlv_def, msgb_apdu_de(msg)+2, msgb_apdu_le(msg)-4, 0, 0);
+	if (rc < 0)
+		goto out;
+
+	if (!TLVP_PRESENT(&tp, UICC_FCP_T_FILE_DESC) ||
+	    TLVP_LEN(&tp, UICC_FCP_T_FILE_DESC) < 5)
+		goto out;
+
+	rc = osim_fcp_fd_decode(&ffdd, TLVP_VAL(&tp, UICC_FCP_T_FILE_DESC),
+				TLVP_LEN(&tp, UICC_FCP_T_FILE_DESC));
+	if (rc < 0)
+		goto out;
+
+	if (ffdd.type != TYPE_EF)
+		goto out;
+
+	switch (ffdd.ef_type) {
+	case EF_TYPE_RECORD_FIXED:
+		for (i = 0; i < ffdd.num_rec; i++) {
+			struct msgb *rmsg = read_record_nr(chan, i+1, ffdd.rec_len);
+			if (!msg)
+				return NULL;
+			printf("Rec %03u: %s\n", i+1,
+				osmo_hexdump(msgb_apdu_de(rmsg), msgb_apdu_le(rmsg)));
+		}
+		break;
+	case EF_TYPE_TRANSP:
+		break;
+	default:
+		goto out;
+	}
+
+out:
+	msgb_free(msg);
+	return -EINVAL;
+}
+
+int main(int argc, char **argv)
+{
+	struct osim_reader_hdl *reader;
+	struct osim_card_hdl *card;
+	struct osim_chan_hdl *chan;
+	struct msgb *msg;
+	int rc;
+
+	reader = osim_reader_open(0, NULL);
+	if (!reader)
+		exit(1);
+	card = osim_card_open(reader);
+	if (!card)
+		exit(2);
+	chan = llist_entry(card->channels.next, struct osim_chan_hdl, list);
+	if (!chan)
+		exit(3);
+
+	msg = try_select_adf_usim(chan);
+	if (!msg || msgb_apdu_sw(msg) != 0x9000)
+		exit(4);
+	dump_fcp_template_msg(msg);
+	msgb_free(msg);
+
+	msg = select_file(chan, 0x6fc5);
+	dump_fcp_template_msg(msg);
+	msgb_free(msg);
+
+	verify_pin(chan, 1, "1653");
+
+	msg = select_file(chan, 0x6f06);
+	dump_fcp_template_msg(msg);
+	msgb_free(msg);
+
+#if 1
+	{
+		struct osim_file_desc *ofd;
+		llist_for_each_entry(ofd, &chan->cwd->child_list, list) {
+			struct msgb *m;
+			printf("\n\n================ %s (%s) ==================\n",
+				ofd->short_name, ofd->long_name);
+
+			m = select_file(chan, ofd->fid);
+			dump_fcp_template_msg(m);
+			msgb_free(m);
+			dump_file(chan, ofd->fid);
+		}
+	}
+#endif
+
+	exit(0);
+}