diff --git a/src/s11/handlers/modify_bearer_handler.c b/src/s11/handlers/modify_bearer_handler.c
new file mode 100644
index 0000000..978ae8a
--- /dev/null
+++ b/src/s11/handlers/modify_bearer_handler.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2003-2018, Great Software Laboratory Pvt. Ltd.
+ * Copyright (c) 2017 Intel Corporation
+ * Copyright (c) 2019, Infosys Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+
+#include "log.h"
+#include "err_codes.h"
+#include "message_queues.h"
+#include "ipc_api.h"
+#include "s11_structs.h"
+#include "msgType.h"
+//#include "stage7_info.h"
+#include "gtpv2c.h"
+#include "gtpv2c_ie.h"
+#include "../../gtpV2Codec/gtpV2StackWrappers.h"
+
+/************************************************************************
+Current file : Stage 7 handler. To listen MB from mme-app and fwd to CP
+ATTACH stages :
+	Stage 1 : IAM-->[stage1 handler]-->AIR, ULR
+	Stage 2 : AIA, ULA -->[stage2 handler]--> Auth req
+	Stage 3 : Auth resp-->[stage3 handler]-->Sec mode cmd
+	Stage 4 : sec mode resp-->[stage4 handler]-->esm infor req
+	Stage 5 : esm infor resp-->[stage5 handler]-->create session
+	Stage 6 : create session resp-->[stage6 handler]-->init ctx setup
+-->	Stage 7 : attach complete-->[stage7 handler]-->modify bearer
+**************************************************************************/
+
+/****Globals and externs ***/
+
+extern int g_s11_fd;
+extern struct sockaddr_in g_s11_cp_addr;
+extern socklen_t g_s11_serv_size;
+/*TODO: S11 protocol sequence number - need to make it atomic. multiple thread to access this*/
+extern volatile uint32_t g_s11_sequence;
+static char buf[S11_MBREQ_STAGE7_BUF_SIZE];
+
+/*TODO: S11 protocol sequence number - need to make it atomic. multiple thread to access this*/
+extern volatile uint32_t g_s11_sequence;
+
+struct MsgBuffer*  mbReqMsgBuf_p = NULL;
+extern struct GtpV2Stack* gtpStack_gp;
+/****Global and externs end***/
+/**
+* Stage specific message processing.
+*/
+static int
+modify_bearer_processing(struct MB_Q_msg *mb_msg)
+{
+	GtpV2MessageHeader gtpHeader;
+	gtpHeader.msgType = GTP_MODIFY_BEARER_REQ;
+	gtpHeader.sequenceNumber = g_s11_sequence;
+	gtpHeader.teidPresent = true;
+	gtpHeader.teid = mb_msg->s11_sgw_c_fteid.header.teid_gre;
+
+	g_s11_sequence++;
+
+	ModifyBearerRequestMsgData msgData;
+	memset(&msgData, 0, sizeof(msgData));
+	msgData.bearerContextsToBeModifiedCount = 1;
+	msgData.bearerContextsToBeModified[0].epsBearerId.epsBearerId = 5;
+	msgData.bearerContextsToBeModified[0].s1EnodebFTeidIePresent = true;
+	msgData.bearerContextsToBeModified[0].s1EnodebFTeid.ipv4present = true;
+	msgData.bearerContextsToBeModified[0].s1EnodebFTeid.interfaceType = mb_msg->s1u_enb_fteid.header.iface_type;
+	msgData.bearerContextsToBeModified[0].s1EnodebFTeid.teidGreKey = mb_msg->s1u_enb_fteid.header.teid_gre;
+	msgData.bearerContextsToBeModified[0].s1EnodebFTeid.ipV4Address.ipValue = mb_msg->s1u_enb_fteid.ip.ipv4.s_addr;
+
+	GtpV2Stack_buildGtpV2Message(gtpStack_gp, mbReqMsgBuf_p, &gtpHeader, &msgData);
+	sendto(g_s11_fd,
+			MsgBuffer_getDataPointer(mbReqMsgBuf_p),
+			MsgBuffer_getBufLen(mbReqMsgBuf_p), 0,
+			(struct sockaddr*)&g_s11_cp_addr,
+			g_s11_serv_size);
+	//TODO " error chk, eagain etc?	
+	log_msg(LOG_INFO, "Modify beader send, len - %d bytes.\n", MsgBuffer_getBufLen(mbReqMsgBuf_p));
+
+	MsgBuffer_reset(mbReqMsgBuf_p);
+
+	return SUCCESS;
+}
+
+/**
+* Thread function for stage.
+*/
+void*
+modify_bearer_handler(void *data)
+{
+	log_msg(LOG_INFO, "Modify bearer handler initialized\n");
+	
+	modify_bearer_processing((struct MB_Q_msg *)data);
+
+	return NULL;
+}