diff --git a/src/network.c b/src/network.c
index 886e5bf0f9a3..629d5fb91eb8 100644
--- a/src/network.c
+++ b/src/network.c
@@ -1581,8 +1581,6 @@ static void sim_opl_read_cb(int ok, int length, int record,
 		return;
 
 optimize:
-	sim_eons_optimize(netreg->eons);
-
 	for (l = netreg->operator_list; l; l = l->next) {
 		struct network_operator_data *opd = l->data;
 		const struct sim_eons_operator_info *eons_info;
diff --git a/src/simutil.c b/src/simutil.c
index 543ab9962ef2..f3fc18d9db29 100644
--- a/src/simutil.c
+++ b/src/simutil.c
@@ -36,10 +36,10 @@
 #include "missing.h"
 
 struct sim_eons {
-	struct sim_eons_operator_info *pnn_list;
-	GSList *opl_list;
-	gboolean pnn_valid;
-	int pnn_max;
+	struct l_queue *opl_list;
+	bool pnn_valid;
+	uint32_t pnn_max;
+	struct sim_eons_operator_info pnn_list[];
 };
 
 struct spdi_operator {
@@ -782,12 +782,12 @@ bool validate_utf8_tlv(const unsigned char *tlv)
 }
 
 static char *sim_network_name_parse(const unsigned char *buffer, int length,
-					gboolean *add_ci)
+					bool *add_ci)
 {
 	char *ret = NULL;
 	unsigned char dcs;
 	int i;
-	gboolean ci = FALSE;
+	bool ci = FALSE;
 	unsigned char *unpacked_buf;
 	long num_char, written;
 	int spare_bits;
@@ -999,22 +999,18 @@ void sim_spdi_free(struct sim_spdi *spdi)
 	g_free(spdi);
 }
 
-static void pnn_operator_free(struct sim_eons_operator_info *oper)
+struct sim_eons *sim_eons_new(uint32_t pnn_records)
 {
-	if (oper == NULL)
-		return;
+	struct sim_eons *eons = l_malloc(sizeof(struct sim_eons) +
+			sizeof(struct sim_eons_operator_info) * pnn_records);
 
-	l_free(oper->info);
-	l_free(oper->shortname);
-	l_free(oper->longname);
-}
+	eons->pnn_valid = false;
+	eons->pnn_max = pnn_records;
 
-struct sim_eons *sim_eons_new(int pnn_records)
-{
-	struct sim_eons *eons = g_new0(struct sim_eons, 1);
+	memset(eons->pnn_list, 0,
+			sizeof(struct sim_eons_operator_info) * pnn_records);
 
-	eons->pnn_list = g_new0(struct sim_eons_operator_info, pnn_records);
-	eons->pnn_max = pnn_records;
+	eons->opl_list = l_queue_new();
 
 	return eons;
 }
@@ -1024,8 +1020,8 @@ gboolean sim_eons_pnn_is_empty(struct sim_eons *eons)
 	return !eons->pnn_valid;
 }
 
-void sim_eons_add_pnn_record(struct sim_eons *eons, int record,
-				const guint8 *tlv, int length)
+void sim_eons_add_pnn_record(struct sim_eons *eons, uint32_t record,
+				const uint8_t *tlv, uint16_t length)
 {
 	const unsigned char *name;
 	int namelength;
@@ -1053,9 +1049,9 @@ void sim_eons_add_pnn_record(struct sim_eons *eons, int record,
 	eons->pnn_valid = TRUE;
 }
 
-static struct opl_operator *opl_operator_alloc(const guint8 *record)
+static struct opl_operator *opl_operator_alloc(const uint8_t *record)
 {
-	struct opl_operator *oper = g_new0(struct opl_operator, 1);
+	struct opl_operator *oper = l_new(struct opl_operator, 1);
 
 	sim_parse_mcc_mnc(record, oper->mcc, oper->mnc);
 	record += 3;
@@ -1071,40 +1067,41 @@ static struct opl_operator *opl_operator_alloc(const guint8 *record)
 }
 
 void sim_eons_add_opl_record(struct sim_eons *eons,
-				const guint8 *contents, int length)
+				const uint8_t *contents, uint16_t length)
 {
 	struct opl_operator *oper;
 
+	if (length < 8)
+		return;
+
 	oper = opl_operator_alloc(contents);
 
-	if (oper->id > eons->pnn_max) {
-		g_free(oper);
+	if (!oper->id || oper->id > eons->pnn_max) {
+		l_free(oper);
 		return;
 	}
 
-	eons->opl_list = g_slist_prepend(eons->opl_list, oper);
-}
-
-void sim_eons_optimize(struct sim_eons *eons)
-{
-	eons->opl_list = g_slist_reverse(eons->opl_list);
+	l_queue_push_tail(eons->opl_list, oper);
 }
 
 void sim_eons_free(struct sim_eons *eons)
 {
-	int i;
+	uint32_t i;
 
 	if (eons == NULL)
 		return;
 
-	for (i = 0; i < eons->pnn_max; i++)
-		pnn_operator_free(eons->pnn_list + i);
+	for (i = 0; i < eons->pnn_max; i++) {
+		struct sim_eons_operator_info *oper = eons->pnn_list + i;
 
-	g_free(eons->pnn_list);
+		l_free(oper->info);
+		l_free(oper->shortname);
+		l_free(oper->longname);
+	}
 
-	g_slist_free_full(eons->opl_list, g_free);
+	l_queue_destroy(eons->opl_list, l_free);
 
-	g_free(eons);
+	l_free(eons);
 }
 
 static const struct sim_eons_operator_info *
@@ -1112,46 +1109,38 @@ static const struct sim_eons_operator_info *
 				const char *mcc, const char *mnc,
 				gboolean have_lac, guint16 lac)
 {
-	GSList *l;
+	const struct l_queue_entry *entry;
 	const struct opl_operator *opl;
-	int i;
+	unsigned int i;
 
-	for (l = eons->opl_list; l; l = l->next) {
-		opl = l->data;
+	for (entry = l_queue_get_entries(eons->opl_list);
+						entry; entry = entry->next) {
+		opl = entry->data;
 
 		for (i = 0; i < OFONO_MAX_MCC_LENGTH; i++)
 			if (mcc[i] != opl->mcc[i] &&
 					!(opl->mcc[i] == 'b' && mcc[i]))
-				break;
-		if (i < OFONO_MAX_MCC_LENGTH)
-			continue;
+				goto no_match;
 
 		for (i = 0; i < OFONO_MAX_MNC_LENGTH; i++)
 			if (mnc[i] != opl->mnc[i] &&
 					!(opl->mnc[i] == 'b' && mnc[i]))
-				break;
-		if (i < OFONO_MAX_MNC_LENGTH)
-			continue;
+				goto no_match;
 
 		if (opl->lac_tac_low == 0 && opl->lac_tac_high == 0xfffe)
-			break;
+			goto found;
 
 		if (have_lac == FALSE)
 			continue;
 
 		if ((lac >= opl->lac_tac_low) && (lac <= opl->lac_tac_high))
-			break;
+			goto found;
+no_match:
 	}
 
-	if (l == NULL)
-		return NULL;
-
-	opl = l->data;
-
-	/* 0 is not a valid record id */
-	if (opl->id == 0)
-		return NULL;
+	return NULL;
 
+found:
 	return &eons->pnn_list[opl->id - 1];
 }
 
diff --git a/src/simutil.h b/src/simutil.h
index 9584d4d9cd62..8c34f9f36488 100644
--- a/src/simutil.h
+++ b/src/simutil.h
@@ -20,6 +20,7 @@
  */
 
 #include <stdbool.h>
+#include <stdint.h>
 
 #define SIM_EFSPN_DC_HOME_PLMN_BIT 0x1
 #define SIM_EFSPN_DC_ROAMING_SPN_BIT 0x2
@@ -299,9 +300,9 @@ enum ber_tlv_data_encoding_type {
 
 struct sim_eons_operator_info {
 	char *longname;
-	gboolean long_ci;
+	bool long_ci;
 	char *shortname;
-	gboolean short_ci;
+	bool short_ci;
 	char *info;
 };
 
@@ -460,18 +461,18 @@ gboolean ber_tlv_builder_recurse_comprehension(struct ber_tlv_builder *builder,
 void ber_tlv_builder_optimize(struct ber_tlv_builder *builder,
 				unsigned char **pdu, unsigned int *len);
 
-struct sim_eons *sim_eons_new(int pnn_records);
-void sim_eons_add_pnn_record(struct sim_eons *eons, int record,
-				const guint8 *tlv, int length);
+struct sim_eons *sim_eons_new(uint32_t pnn_records);
+void sim_eons_add_pnn_record(struct sim_eons *eons, uint32_t record,
+				const uint8_t *tlv, uint16_t length);
 gboolean sim_eons_pnn_is_empty(struct sim_eons *eons);
 void sim_eons_add_opl_record(struct sim_eons *eons,
-				const guint8 *contents, int length);
+				const uint8_t *contents, uint16_t length);
 void sim_eons_optimize(struct sim_eons *eons);
 const struct sim_eons_operator_info *sim_eons_lookup_with_lac(
 						struct sim_eons *eons,
 						const char *mcc,
 						const char *mnc,
-						guint16 lac);
+						uint16_t lac);
 const struct sim_eons_operator_info *sim_eons_lookup(struct sim_eons *eons,
 						const char *mcc,
 						const char *mnc);
diff --git a/unit/test-simutil.c b/unit/test-simutil.c
index 4199991a4d2a..365ef318d937 100644
--- a/unit/test-simutil.c
+++ b/unit/test-simutil.c
@@ -393,7 +393,6 @@ static void test_eons(void)
 	g_assert(!sim_eons_pnn_is_empty(eons_info));
 
 	sim_eons_add_opl_record(eons_info, valid_efopl, sizeof(valid_efopl));
-	sim_eons_optimize(eons_info);
 
 	op_info = sim_eons_lookup(eons_info, "246", "82");
 	g_assert(op_info == NULL);
