diff --git a/database/install/u_ims_user.sql b/database/install/u_ims_user.sql
index e5e6e5a9..7751dc9c 100755
--- a/database/install/u_ims_user.sql
+++ b/database/install/u_ims_user.sql
@@ -11,7 +11,7 @@
  Target Server Version : 100621 (10.6.21-MariaDB-0ubuntu0.22.04.2)
  File Encoding         : 65001
 
- Date: 10/04/2025 20:59:15
+ Date: 12/04/2025 17:18:28
 */
 
 SET NAMES utf8mb4;
@@ -30,7 +30,7 @@ CREATE TABLE `u_ims_user`  (
   `vni` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '',
   `tenant_id` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT 'multi-tenancy refer to sys_tenant.tenant_id',
   PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE INDEX `uk_imsi_ne`(`imsi`, `ne_id`) USING BTREE COMMENT 'imsi_neid'
-) ENGINE = InnoDB AUTO_INCREMENT = 371900 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = 'UDM' ROW_FORMAT = Dynamic;
+  UNIQUE INDEX `uk_imsi_msisdn_neid`(`imsi`, `msisdn`, `ne_id`) USING BTREE COMMENT 'imsi_msisdn_neid'
+) ENGINE = InnoDB AUTO_INCREMENT = 379066 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = 'UDM' ROW_FORMAT = Dynamic;
 
 SET FOREIGN_KEY_CHECKS = 1;
diff --git a/database/upgrade/upg_u_ims_user.sql b/database/upgrade/upg_u_ims_user.sql
index c442d68c..06642e75 100755
--- a/database/upgrade/upg_u_ims_user.sql
+++ b/database/upgrade/upg_u_ims_user.sql
@@ -11,7 +11,7 @@
  Target Server Version : 100621 (10.6.21-MariaDB-0ubuntu0.22.04.2)
  File Encoding         : 65001
 
- Date: 10/04/2025 20:59:34
+ Date: 12/04/2025 17:18:16
 */
 
 SET NAMES utf8mb4;
@@ -29,7 +29,7 @@ CREATE TABLE IF NOT EXISTS `u_ims_user`  (
   `vni` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '',
   `tenant_id` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT 'multi-tenancy refer to sys_tenant.tenant_id',
   PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE INDEX `uk_imsi_ne`(`imsi`, `ne_id`) USING BTREE COMMENT 'imsi_neid'
-) ENGINE = InnoDB AUTO_INCREMENT = 371900 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = 'UDM' ROW_FORMAT = Dynamic;
+  UNIQUE INDEX `uk_imsi_msisdn_neid`(`imsi`, `msisdn`, `ne_id`) USING BTREE COMMENT 'imsi_msisdn_neid'
+) ENGINE = InnoDB AUTO_INCREMENT = 379066 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = 'UDM' ROW_FORMAT = Dynamic;
 
 SET FOREIGN_KEY_CHECKS = 1;
diff --git a/features/ue/model/ims_user.go b/features/ue/model/ims_user.go
index 2f78dd11..280c58fb 100644
--- a/features/ue/model/ims_user.go
+++ b/features/ue/model/ims_user.go
@@ -16,8 +16,9 @@ const (
 type CallTag int
 
 const (
-	TAG_VoIP  CallTag = iota // VoIP标记
-	TAG_VoLTE                // VoLTE标记
+	TAG_VoIP    CallTag = iota // VoIP标记
+	TAG_VoLTE                  // VoLTE标记
+	TAG_UNKNOWN                // 未知标记
 )
 
 func (ct CallTag) Enum() string {
@@ -46,9 +47,12 @@ func ParseCallTag(s string) CallTag {
 		return TAG_VoIP
 	case "volte":
 		return TAG_VoLTE
+	case "":
+		// 如果字符串为空，则返回未知标记
+		return TAG_UNKNOWN
 	default:
 		// 默认返回 VoIP
-		return TAG_VoIP
+		return TAG_VoLTE
 	}
 }