diff --git a/subsys/modem/modem_ppp.c b/subsys/modem/modem_ppp.c
index dffa4f68dbf..91085317d99 100644
--- a/subsys/modem/modem_ppp.c
+++ b/subsys/modem/modem_ppp.c
@@ -192,40 +192,45 @@ static uint8_t modem_ppp_wrap_net_pkt_byte(struct modem_ppp *ppp)
 	return 0;
 }
 
+static bool modem_ppp_is_byte_expected(uint8_t byte, uint8_t expected_byte)
+{
+	if (byte == expected_byte) {
+		return true;
+	}
+	LOG_DBG("Dropping byte 0x%02hhx because 0x%02hhx was expected.", byte, expected_byte);
+	return false;
+}
+
 static void modem_ppp_process_received_byte(struct modem_ppp *ppp, uint8_t byte)
 {
 	switch (ppp->receive_state) {
 	case MODEM_PPP_RECEIVE_STATE_HDR_SOF:
-		if (byte == MODEM_PPP_CODE_DELIMITER) {
+		if (modem_ppp_is_byte_expected(byte, MODEM_PPP_CODE_DELIMITER)) {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_FF;
 		}
-
 		break;
 
 	case MODEM_PPP_RECEIVE_STATE_HDR_FF:
 		if (byte == MODEM_PPP_CODE_DELIMITER) {
 			break;
 		}
-
-		if (byte == 0xFF) {
+		if (modem_ppp_is_byte_expected(byte, 0xFF)) {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_7D;
 		} else {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_SOF;
 		}
-
 		break;
 
 	case MODEM_PPP_RECEIVE_STATE_HDR_7D:
-		if (byte == MODEM_PPP_CODE_ESCAPE) {
+		if (modem_ppp_is_byte_expected(byte, MODEM_PPP_CODE_ESCAPE)) {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_23;
 		} else {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_SOF;
 		}
-
 		break;
 
 	case MODEM_PPP_RECEIVE_STATE_HDR_23:
-		if (byte == 0x23) {
+		if (modem_ppp_is_byte_expected(byte, 0x23)) {
 			ppp->rx_pkt = net_pkt_rx_alloc_with_buffer(ppp->iface,
 				CONFIG_MODEM_PPP_NET_BUF_FRAG_SIZE, AF_UNSPEC, 0, K_NO_WAIT);
 
@@ -238,7 +243,6 @@ static void modem_ppp_process_received_byte(struct modem_ppp *ppp, uint8_t byte)
 			LOG_DBG("Receiving PPP frame");
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_WRITING;
 			net_pkt_cursor_init(ppp->rx_pkt);
-
 		} else {
 			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_SOF;
 		}
@@ -247,11 +251,10 @@ static void modem_ppp_process_received_byte(struct modem_ppp *ppp, uint8_t byte)
 
 	case MODEM_PPP_RECEIVE_STATE_WRITING:
 		if (byte == MODEM_PPP_CODE_DELIMITER) {
-			LOG_DBG("Received PPP frame");
+			LOG_DBG("Received PPP frame (len %zu)", net_pkt_get_len(ppp->rx_pkt));
 
 			/* Remove FCS */
 			net_pkt_remove_tail(ppp->rx_pkt, MODEM_PPP_FRAME_TAIL_SIZE);
-			net_pkt_cursor_init(ppp->rx_pkt);
 			net_pkt_set_ppp(ppp->rx_pkt, true);
 
 			if (net_recv_data(ppp->iface, ppp->rx_pkt) < 0) {
@@ -260,7 +263,8 @@ static void modem_ppp_process_received_byte(struct modem_ppp *ppp, uint8_t byte)
 			}
 
 			ppp->rx_pkt = NULL;
-			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_SOF;
+			/* Skip SOF because the delimiter may be omitted for successive frames. */
+			ppp->receive_state = MODEM_PPP_RECEIVE_STATE_HDR_FF;
 			break;
 		}