title: What is proper way to read and delete message from SIM900?
body: <p>I would like to wait in loop for sms message arrival on my SIM900 and when message is detected , read that message and delete it from the system.
  What's bothering me is what if another message comes while I am working on this one (Unsolicited message info).</p>
  
  <p>What is proper algorithm to handle sms reading and deletion?</p>