title: How to find out whether android device has cellular radio module?
body: <p>How can I find out for sure that device really has gsm, cdma or other cellular network equipment (not just WiFi)?
  I don't want to check current connected network state, because device can be offline in the moment.
  And I don't want to check device id via ((TelephonyManager) act.getSystemService(Context.TELEPHONY_SERVICE)).getDeviceId() because some devices would just give you polymorphic or dummy device ID. </p>
  
  <p>Actualy, I need to check cell equipment exactly for skipping TelephonyManager.getDeviceId and performing Settings.Secure.ANDROID_ID check on those devices that don't have cellular radio. I have at least one tablet (Storage Options Scroll Excel 7") which returns different IMEIs every time you ask it, although it should return null as it has no cell radio (the same situation here: <a href="https://stackoverflow.com/questions/11518113">Android: getDeviceId() returns an IMEI, adb shell dumpsys iphonesubinfo returns Device ID=NULL</a>). But I need to have reliable device id that is the same every time I ask.</p>
  
  <p>I'd be glad to hear your thoughts!</p>