diff --git a/mbtk/include/lynq/lynq-qser-data.h b/mbtk/include/lynq/lynq-qser-data.h
index c84ab21..0d85f67 100755
--- a/mbtk/include/lynq/lynq-qser-data.h
+++ b/mbtk/include/lynq/lynq-qser-data.h
@@ -114,7 +114,7 @@
 } qser_data_call_info_s;
 
 typedef struct {
-	unsigned char profile_idx;              /*!< UMTS/CDMA profile ID. */
+	unsigned char profile_idx;              /*!< UMTS/CDMA profile ID. range: 0 - 7*/
 	qser_apn_pdp_type_e pdp_type;             /*!< Packet Data Protocol (PDP) type specifies the type of data payload
 	                                             exchanged over the airlink when the packet data session is
 	                                             established with this profile. */