Uploading File to server taking Long Time Android - java

I have developed application where I am sending audio file and receiver information to server, Its working but many times uploading takes very long time and cause ConnectionTimeout exception.
Code I am using now:
BasicHttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 120000);
HttpConnectionParams.setSoTimeout(httpParameters, 120000);
HttpClient httpClient = new DefaultHttpClient(httpParameters);
postStr = new Gson().toJson(audioBean);
File file = new File(audioBean.getFilePath());
ContentBody contentBody = new FileBody(file, "audio/wav");
MultipartEntity mpEntity = new MultipartEntity();
mpEntity.addPart("audio", new StringBody(postStr));
mpEntity.addPart("file", contentBody);
httpPost.setEntity(mpEntity);
HttpResponse httpResponse = httpClient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
above code runs in thread, please tell me how to improve performance

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Thank You.

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