title: IMEI alternate in iPhone
body: <p>I am developing an app for iPhone in which device is registered with the backend. For Android version, I was fetching the IMEI from the device and authenticating it with the IMEI stored at back end. But, Apple does not permit fetching IMEI from device, What alternate shall I use so that the authentication takes place as it is mandatory.Also, the user can change the IMEI as he wishes(for Android Version.)</p>