title: Flutter How to get an imei
body: <p>I would like to create a licensing system to activate my application. For that the user must send his IMEI (or number never changing on the telephone in order to identify it).</p>
  <p>After my research I did not find how to get the IMEI of a phone. There is the device_info package but this one does not give me this information.</p>
  <p>I saw that now we can use the UUID. But I'm wondering I read it could change if I reset the phone or reinstall the app. Is it true ?</p>
  <p>Phones on which my app will be installed can be reset and the app reinstalled often. So what should I do to have a phone number that never changes, allowing me to build my License system which is offline ?</p>
  <p>Thank you by advance for advices.</p>