protected void getDeviceUUID(){

        try {

            Context context = cordova.getActivity().getApplicationContext();

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

            String uuid;

            String androidID = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);

            String deviceID = tm.getDeviceId();

            String simID = tm.getSimSerialNumber();

            if ("9774d56d682e549c".equals(androidID) || androidID == null) {

                androidID = "";

            }

            if (deviceID == null) {

                deviceID = "";

            }

            if (simID == null) {

                simID = "";

            }

            uuid = androidID + deviceID + simID;

            uuid = String.format("%32s", uuid).replace(' ', '0');

            uuid = uuid.substring(0, 32);

            uuid = uuid.replaceAll("(\\w{8})(\\w{4})(\\w{4})(\\w{4})(\\w{12})", "$1-$2-$3-$4-$5");

            this.callbackContext.success(uuid);

        }catch(Exception e ) {

            this.callbackContext.error("Exception occurred: ".concat(e.getMessage()));

        }

    }