Unable to get the response from the API - wso2

Question

Scenario
I'm sending a request payload to the API that further calls the SMS service provider in the in-sequence flow, I need to share back the response from the SMS service provider as it is. The API works fine and I do receive SMS on phone but I'm unable to share back the response from the service provider in the out sequence flow.
The response body from my SMS service provider is actually text as shown:
The Response header of SMS Service Provider looks like this:
API
<?xml version="1.0" encoding="UTF-8"?>
<api context="/mobilink" name="MobilinkSmsApi" xmlns="http://ws.apache.org/ns/synapse">
<resource methods="POST" uri-template="/send">
<inSequence>
<property action="remove" name="TRANSPORT_HEADERS" scope="axis2"/>
<property description="username" expression="json-eval($.username)" name="uri.var.username" scope="default" type="STRING"/>
<property description="password" expression="json-eval($.password)" name="uri.var.password" scope="default" type="STRING"/>
<property description="to" expression="json-eval($.to)" name="uri.var.to" scope="default" type="STRING"/>
<property description="from" expression="json-eval($.from)" name="uri.var.from" scope="default" type="STRING"/>
<property description="message" expression="json-eval($.message)" name="uri.var.message" scope="default" type="STRING"/>
<log level="full"/>
<call>
<endpoint>
<http method="post" statistics="enable" trace="enable" uri-template="https://coXXXXX.XXXX.com/sendsms_url.html?Username={uri.var.username}&Password={uri.var.password}&From={uri.var.from}&To={uri.var.to}&Message={uri.var.message}">
<suspendOnFailure>
<initialDuration>-1</initialDuration>
<progressionFactor>-1</progressionFactor>
<maximumDuration>0</maximumDuration>
</suspendOnFailure>
<markForSuspension>
<retriesBeforeSuspension>0</retriesBeforeSuspension>
</markForSuspension>
</http>
</endpoint>
</call>
</inSequence>
<outSequence>
<log category="TRACE" level="full"/>
<property description="Content-Type" name="Content-Type" scope="default" type="STRING" value="text/html"/>
<property name="messageType" scope="axis2" type="STRING" value="text/html"/>
<respond/>
</outSequence>
<faultSequence>
<log category="ERROR" level="full"/>
</faultSequence>
</resource>
</api>
Question
My Question is how to share back the response from the service provider in the out sequence? I tried to use property with value text/html and even used content-type as text/html but It didn't worked.

Answer 1

There are two ways to achieve this. either one of below mentioned way you can follow
place <respond/> after <call> mediator
Use <Send> mediator instead of <call>, so that flow will come from insequence to outsequence where you already placed <respond/> to send back message to client

Answer 2

The issue got resolved when I placed the mediator in the inSequence flow.
previously I was placing the mediator in the outSequence