diff --git a/plugins/mbm.c b/plugins/mbm.c
index fa0088c9..b787aeb7 100644
--- a/plugins/mbm.c
+++ b/plugins/mbm.c
@@ -452,7 +452,7 @@ static void mbm_post_sim(struct ofono_modem *modem)
 	ofono_radio_settings_create(modem, 0, "stemodem", data->modem_port);
 
 	ofono_sms_create(modem, 0, "atmodem", data->modem_port);
-	ofono_sim_auth_create(modem, 0, "atmodem", data->modem_port);
+	ofono_sim_auth_create(modem);
 }
 
 static void mbm_post_online(struct ofono_modem *modem)
diff --git a/plugins/phonesim.c b/plugins/phonesim.c
index 3af2c469..bbbcbb30 100644
--- a/plugins/phonesim.c
+++ b/plugins/phonesim.c
@@ -861,7 +861,7 @@ static void phonesim_post_sim(struct ofono_modem *modem)
 		ofono_sms_create(modem, 0, "atmodem", data->chat);
 
 	ofono_radio_settings_create(modem, 0, "phonesim", data->chat);
-	ofono_sim_auth_create(modem, 0, "atmodem", data->chat);
+	ofono_sim_auth_create(modem);
 }
 
 static void phonesim_post_online(struct ofono_modem *modem)
diff --git a/plugins/xmm7xxx.c b/plugins/xmm7xxx.c
index a2582dff..9f0ae8f4 100644
--- a/plugins/xmm7xxx.c
+++ b/plugins/xmm7xxx.c
@@ -325,7 +325,7 @@ static void xmm7xxx_post_sim(struct ofono_modem *modem)
 
 	ofono_lte_create(modem, "atmodem", data->chat);
 	ofono_radio_settings_create(modem, 0, "xmm7modem", data->chat);
-	ofono_sim_auth_create(modem, 0, "atmodem", data->chat);
+	ofono_sim_auth_create(modem);
 }
 
 static void xmm7xxx_post_online(struct ofono_modem *modem)