diff --git a/Makefile.am b/Makefile.am
index 10892a6f..9c8083b2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -169,7 +169,8 @@ builtin_sources += $(gatchat_sources) \
 				drivers/atmodem/atutil.h \
 				drivers/atmodem/atutil.c \
 				drivers/atmodem/gprs.c \
-				drivers/atmodem/gprs-context.c
+				drivers/atmodem/gprs-context.c \
+				drivers/atmodem/sim-auth.c
 
 builtin_modules += nwmodem
 builtin_sources += drivers/atmodem/atutil.h \
diff --git a/drivers/atmodem/atmodem.c b/drivers/atmodem/atmodem.c
index c88f6b20..e140281c 100644
--- a/drivers/atmodem/atmodem.c
+++ b/drivers/atmodem/atmodem.c
@@ -51,12 +51,14 @@ static int atmodem_init(void)
 	at_call_volume_init();
 	at_gprs_init();
 	at_gprs_context_init();
+	at_sim_auth_init();
 
 	return 0;
 }
 
 static void atmodem_exit(void)
 {
+	at_sim_auth_exit();
 	at_stk_exit();
 	at_sim_exit();
 	at_sms_exit();
diff --git a/drivers/atmodem/atmodem.h b/drivers/atmodem/atmodem.h
index c7f0eedc..1b7cf670 100644
--- a/drivers/atmodem/atmodem.h
+++ b/drivers/atmodem/atmodem.h
@@ -71,3 +71,6 @@ extern void at_gprs_exit(void);
 
 extern void at_gprs_context_init(void);
 extern void at_gprs_context_exit(void);
+
+extern void at_sim_auth_init(void);
+extern void at_sim_auth_exit(void);
diff --git a/drivers/atmodem/sim-auth.c b/drivers/atmodem/sim-auth.c
new file mode 100644
index 00000000..3b636bd5
--- /dev/null
+++ b/drivers/atmodem/sim-auth.c
@@ -0,0 +1,163 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2008-2011  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <string.h>
+
+#include <glib.h>
+
+#include <ofono/modem.h>
+#include <ofono/sim-auth.h>
+
+#include "gatchat.h"
+#include "gatresult.h"
+#include "simutil.h"
+#include "vendor.h"
+
+#include "atmodem.h"
+
+struct sim_auth_data {
+	GAtChat *chat;
+	unsigned int vendor;
+};
+
+static const char *cuad_prefix[] = { "+CUAD:", NULL };
+
+static void at_discover_apps_cb(gboolean ok, GAtResult *result,
+				gpointer user_data)
+{
+	struct cb_data *cbd = user_data;
+	GAtResultIter iter;
+	ofono_sim_list_apps_cb_t cb = cbd->cb;
+	struct ofono_error error;
+	const unsigned char *dataobj;
+	gint linelen;
+	unsigned char *buffer;
+	int len;
+
+	decode_at_error(&error, g_at_result_final_response(result));
+
+	if (!ok) {
+		cb(&error, NULL, 0, cbd->data);
+		return;
+	}
+
+	g_at_result_iter_init(&iter, result);
+
+	len = 0;
+	while (g_at_result_iter_next(&iter, "+CUAD:")) {
+		if (!g_at_result_iter_next_hexstring(&iter, NULL, &linelen))
+			goto error;
+
+		len += linelen;
+	}
+
+	g_at_result_iter_init(&iter, result);
+
+	buffer = g_malloc(len);
+	len = 0;
+
+	while (g_at_result_iter_next(&iter, "+CUAD:")) {
+		g_at_result_iter_next_hexstring(&iter, &dataobj, &linelen);
+		memcpy(buffer + len, dataobj, linelen);
+		len += linelen;
+	}
+
+	cb(&error, buffer, len, cbd->data);
+
+	g_free(buffer);
+	return;
+
+error:
+	CALLBACK_WITH_FAILURE(cb, NULL, 0, cbd->data);
+}
+
+static void at_discover_apps(struct ofono_sim_auth *sa,
+				ofono_sim_list_apps_cb_t cb,
+				void *data)
+{
+	struct sim_auth_data *sad = ofono_sim_auth_get_data(sa);
+	struct cb_data *cbd = cb_data_new(cb, data);
+
+	if (cbd && g_at_chat_send(sad->chat, "AT+CUAD", cuad_prefix,
+					at_discover_apps_cb, cbd, g_free) > 0)
+		return;
+
+	g_free(cbd);
+
+	CALLBACK_WITH_FAILURE(cb, NULL, 0, data);
+}
+
+static gboolean at_sim_auth_register(gpointer user)
+{
+	struct ofono_sim_auth *sa = user;
+
+	ofono_sim_auth_register(sa);
+
+	return FALSE;
+}
+
+static int at_sim_auth_probe(struct ofono_sim_auth *sa, unsigned int vendor,
+				void *data)
+{
+	GAtChat *chat = data;
+	struct sim_auth_data *sad;
+
+	sad = g_new0(struct sim_auth_data, 1);
+	sad->chat = g_at_chat_clone(chat);
+	sad->vendor = vendor;
+
+	ofono_sim_auth_set_data(sa, sad);
+	g_idle_add(at_sim_auth_register, sa);
+
+	return 0;
+}
+
+static void at_sim_auth_remove(struct ofono_sim_auth *sa)
+{
+	struct sim_auth_data *sad = ofono_sim_auth_get_data(sa);
+
+	ofono_sim_auth_set_data(sa, NULL);
+
+	g_at_chat_unref(sad->chat);
+	g_free(sad);
+}
+
+static struct ofono_sim_auth_driver driver = {
+	.name		= "atmodem",
+	.probe		= at_sim_auth_probe,
+	.remove		= at_sim_auth_remove,
+	.list_apps	= at_discover_apps,
+};
+
+void at_sim_auth_init(void)
+{
+	ofono_sim_auth_driver_register(&driver);
+}
+
+void at_sim_auth_exit(void)
+{
+	ofono_sim_auth_driver_unregister(&driver);
+}