Why is not the location determined on all devices?

Good evening! Shoveled all the LocacionListener documentation, as well as reviewed and tried different implementations, but each time with tests on different devices, there are those on which everything is sad.
Tell me what the problem can be? I no longer understand. For example, the problems were on the Samsung Galaxy S1, Galaxy fit, htc one v, HTC Incredible S, Pipo Smart S1, etc. I don’t understand what's wrong. I myself test everything on the Galaxy S3 . At the moment I use the implementation like this (and there were others).

 public class LocationListener implements android.location.LocationListener { private LocationManager mLocationManager = null; private String mCurrentProvider; private boolean mLocationEnabled = false; private Location mLocation = null; private LocationListener locationListener; //реализация интерфейса Runnable которая вызовет нужные методы в UI потоке private LocationRunnable runnable = null; public LocationListener(Context context, LocationRunnable runnable) { this.runnable = runnable; mLocationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); } public boolean enableMyLocation() { mLocationEnabled = true; List<String> mProviders = mLocationManager.getProviders(true); if (mProviders.size() > 0) { locationListener = this; mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 1, locationListener); if(mProviders.contains( LocationManager.GPS_PROVIDER) && mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) mLocationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 1000, 1, locationListener); } //запускаем фоновый процесс, который отсчитает, что прошло 30 секунд new TimeOut().execute(); return false; } private class TimeOut extends AsyncTask<Void,Void,Void> { @Override protected Void doInBackground(Void... params) { //тут отсчитываем 30 секунд и если метод onLocationChanged еще не вызывался, то запустим runnable long sec = System.currentTimeMillis(); //тут стал проверять locationChanged которая с моификтором volatile while (!locationChanged == null && System.currentTimeMillis() - sec < 30 * 1000) { } return null; } @Override protected void onPostExecute(Void p) { if (!locationChanged) { runnable.setLocation(mLocation); runnable.run(); } //откажемся от обновлений mLocationManager.removeUpdates(locationListener); } } // тут сделал как сказали, и отказался от использования в фоновом потоке locztion private volatile boolean locationChanged = false; public void onLocationChanged(Location location) { //если мы определили местоположение то вызовем изменения в UI mLocation = location; locationChanged = true; runnable.setLocation(location); runnable.run(); //откажемся от обновлений mLocationManager.removeUpdates(locationListener); } } 

UPD: declined GPS detection, stopped accessing mLocation in the background thread, instead checking the boolean variable with the volatile modifier. The effect of the actions taken is zero.