private void startAlarm() {
        AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
        SharedPreferences prefs = this.getSharedPreferences("Prefs", MODE_WORLD_READABLE);
        int i = prefs.getInt("UpdateFrequency", 1);
        UpdateFrequency freq = UpdateFrequency.getIt(i);
        int interval = freq.getConstantValue();

        alarm.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 600000, interval,
                PendingIntent.getService(this, 999, new Intent(this, ContactUpdaterService.class), PendingIntent.FLAG_UPDATE_CURRENT));

    }