title: Field testing iPhone for Cell ID and RSSI
body: <p>I need to write a testing application to retrieve info about <code>cell id</code> and <code>rssi</code> on iphone4 IOS 4.2.1, like FieldTest application (Calling <em>3001#12345#</em> view UMTS Cell Enviroment/GSM Cell Enviroment).</p>
  
  <p>I have tried to import CoreTelephony framework and using private API (<code>CTServerConnectionCreate</code>/<code>CTServerConnectionCellMonitorStart</code>).</p>
  
  <p>In this way I am able to retrieve info if I connect to 2g network.</p>
  
  <p>If enable 3G, when I call <code>CTServerConnectionCellMonitorGetCellCount</code>, cellcount is always 0.</p>
  
  <p>How can I retrieve these info if connected to 3G Network?</p>