title: Get IMEI for iOS7 programmatically
body: <p>in XCode 4.6, iOS 6.1, we use CoreTelephony to obtain IMEI, the same way mentioned in <a href="https://stackoverflow.com/questions/15836900/get-imei-on-iphone-with-coretelephony">get IMEI on iPhone with CoreTelephony?</a> question, but after switching to iOS7 and XCode 5 it doesn't work anymore.
  My system considers IMEI as an unbreakable way to identify a cellphone and guarantee it is linked to a specific user, also other security issues depend on this identifier.
  With the new iOS the code is not working and we hadn't found a way to obtain it.</p>
  
  <p>My central question is: What options do I have to obtain IMEI in iOS7 / XCode 5?</p>
  
  <p>Variations are:
   - How else could I guarantee a cellphone belongs to a specific person? Identity is very important in my system and ownership of device is a requisite.
   - What other options do we have to keep secure the system without the need to rewrite too much?</p>