title: Get current type of internet connection
body: <p>I want to get the technology of radio access (internet connection), so detect if the device is connected to Wifi or WWAN connection (and in this case, which type of WWAN : GPRS, EGDE, 3G, 3G+, 3G++, or 4G).</p>
  
  <p>Does <strong>CTTelephonyNetworkInfo</strong> works for iPhone and iPad on iOS7.1 ?</p>
  
  <p>I've tried to detect a Wifi connection on an iPad but I print a null result.
  This is my code :</p>
  
  <pre><code>CTTelephonyNetworkInfo *telephonyInfo = [CTTelephonyNetworkInfo new];
  NSLog(@"Current Radio Access Technology: %@", telephonyInfo.currentRadioAccessTechnology);
  </code></pre>
  
  <p>Someone can told me why ? I'm not sure to understand everything about this...</p>
  
  <p>Thanks for your help</p>
  
  <p>(Source : <a href="http://www.objc.io/issue-5/iOS7-hidden-gems-and-workarounds.html" rel="nofollow">http://www.objc.io/issue-5/iOS7-hidden-gems-and-workarounds.html</a>, section "Know your Radio")</p>