diff --git a/app/src/main/java/com/uam/wmi/findmytutor/service/BackgroundLocalizationService.java b/app/src/main/java/com/uam/wmi/findmytutor/service/BackgroundLocalizationService.java
index aedb4bc..3419925 100644
--- a/app/src/main/java/com/uam/wmi/findmytutor/service/BackgroundLocalizationService.java
+++ b/app/src/main/java/com/uam/wmi/findmytutor/service/BackgroundLocalizationService.java
@@ -25,7 +25,6 @@ import android.util.Log;
 import com.annimon.stream.Stream;
 import com.google.android.gms.location.FusedLocationProviderClient;
 import com.google.android.gms.location.LocationServices;
-import com.jakewharton.retrofit2.adapter.rxjava2.HttpException;
 import com.mapbox.geojson.Point;
 import com.mapbox.mapboxsdk.geometry.LatLng;
 import com.uam.wmi.findmytutor.model.Coordinate;
@@ -33,21 +32,17 @@ import com.uam.wmi.findmytutor.network.ApiClient;
 import com.uam.wmi.findmytutor.utils.ApproximatedLocalization;
 import com.uam.wmi.findmytutor.utils.MapUtils;
 import com.uam.wmi.findmytutor.utils.PrefUtils;
-import com.uam.wmi.findmytutor.utils.RestApiHelper;
 import com.uam.wmi.findmytutor.utils.SharingLevel;
 
 import org.apache.commons.collections4.queue.CircularFifoQueue;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.atomic.AtomicReference;
 
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
 import io.reactivex.observers.DisposableCompletableObserver;
-import io.reactivex.observers.DisposableSingleObserver;
 import io.reactivex.schedulers.Schedulers;
-import okhttp3.ResponseBody;
 
 import static com.uam.wmi.findmytutor.utils.Const.offlineBackgroundLocationInterval;
 import static com.uam.wmi.findmytutor.utils.Const.onlineBackgroundLocationInterval;
@@ -60,18 +55,14 @@ import static java.lang.String.valueOf;
 public class BackgroundLocalizationService extends Service {
 
     private static final String TAG = "MyLocationService";
-    private static final float LOCATION_DISTANCE = 1f;
     private static long notify_interval = onlineBackgroundLocationInterval;
     private static long notify_interval_inside_building = onlineBackgroundLocationInterval;
     private static long notify_interval_outside_building = offlineBackgroundLocationInterval;
     private static int coordinatesHistoryLength = 5;
-    private static final Long LOCATION_INTERVAL = notify_interval;
     private Location mLastLocation;
     private Boolean stopService = false;
     private ArrayList<String> providers = new ArrayList<String>();
-    private LocationListener[] mLocationListeners;
     private CircularFifoQueue<Location> coordinatesHistory = new CircularFifoQueue<Location>(coordinatesHistoryLength);
-    private LocationManager mLocationManager = null;
     private Handler mHandler = new Handler();
     private Runnable mStatusChecker;
     private FusedLocationProviderClient mFusedLocationClient;
@@ -80,12 +71,6 @@ public class BackgroundLocalizationService extends Service {
         providers.add(LocationManager.GPS_PROVIDER);
         providers.add(LocationManager.NETWORK_PROVIDER);
         providers.add(LocationManager.PASSIVE_PROVIDER);
-
-        mLocationListeners = new LocationListener[]{
-                new LocationListener(LocationManager.GPS_PROVIDER),
-                new LocationListener(LocationManager.NETWORK_PROVIDER),
-                new LocationListener(LocationManager.PASSIVE_PROVIDER)
-        };
     }
 
     @Override
@@ -130,6 +115,7 @@ public class BackgroundLocalizationService extends Service {
                 try {
                     mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
                     getLocalizationFromListeners();
+                    changeBackgroundMode();
                 } finally {
                     mFusedLocationClient = null;
                     destroyLocationListeners();