title: Bandwidth save GPRS and TCP
body: <p>Hello i have made a program for my old windows mobile phone to send gps data ,temperature etc every 5 seconds just for experimental reasons to create a fleet management system.</p>
  
  <p>I noticed that within one hour 350kb were consumed although i sent only 20kb of data...</p>
  
  <p>As i dont have deep knowledge in networks ,how much does a tcp connection cost in bytes?</p>
  
  <p>Maybe i should keep the socket alive because i close and open it every 5 seconds.Would that save bytes?</p>
  
  <p>Also does MTU matter here?
  Any other idea to reduce the overhead?
  thank you</p>