[android] How can I get phone serial number (IMEI)

I want to get phone serial number by programming to registration configuration of my application and number of users and phones that my app has been installed on them.

Can I get that?

and can I get phone model that my app has been installed on them?

public String getIMEI(Context context){

    TelephonyManager mngr = (TelephonyManager) context.getSystemService(context.TELEPHONY_SERVICE); 
    String imei = mngr.getDeviceId();
    return imei;

}

try this

 final TelephonyManager tm =(TelephonyManager)getBaseContext().getSystemService(Context.TELEPHONY_SERVICE);

  String deviceid = tm.getDeviceId();

Use below code for IMEI:

TelephonyManager tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
String imei= tm.getDeviceId();

Here is the code:-

telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);


    deviceId = telephonyManager.getDeviceId(); 
    Log.d(TAG, "getDeviceId() " + deviceId);



    phoneType = telephonyManager.getPhoneType();
    Log.d(TAG, "getPhoneType () " + phoneType);