Android google maps api v2 its blank on device and shows on emulator

like the title says I'm using google maps api v2 and it works on my avd but not on my real device (on my device its just blank)

I found many questions on this same topic but none of those were helpful to my case

any ideas? oh I almost forgot when I run it with the emulator the only error that I get its

"failed to find provider info for com.google.settings"

I already tried with getting a new api key, keystone, uninstalling the app from my device before installing it again... dont know what else.

thank you for at least reading this

EDIT: Im using a Lg g2 dont know if it helps

EDIT2: Manifest, mapa.java and xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="Login.cyclingcenter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.ViBRATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="Swipe"
></activity>
<activity
android:name="Login"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Goolge Maps API Key -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyBtOk02dBY98C7S8BILmMyLLkMbUh8-jLs" />
<meta-data
android:name="com.google.android.gms.version"
android:value="6171000" />
</application>

package Login.cyclingcenter;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMyLocationChangeListener;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.model.LatLng;
public class Mapa extends Fragment {
MapView mMapView;
private GoogleMap googleMap;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View mapa = inflater.inflate(R.layout.fragment_map, container, false);
mMapView = (MapView) mapa.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
establecerMap();
return mapa;
}
public void establecerMap(){
if(googleMap==null){
googleMap = mMapView.getMap();
}
else{
//configuración mapa
configuraMap();
}
}
public void configuraMap(){
//vista normal, puede ser satelite e hibrido
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//establezco mi posicion en el mapa
googleMap.setMyLocationEnabled(true);
// Asigno un nivel de zoom
CameraUpdate ZoomCam = CameraUpdateFactory.zoomTo(14);
googleMap.animateCamera(ZoomCam);
// Establezco un listener para ver cuando cambio de posicion
googleMap.setOnMyLocationChangeListener(new OnMyLocationChangeListener() {
public void onMyLocationChange(Location pos) {
// TODO Auto-generated method stub
// Extraigo la Lat y Lon del Listener
double lat = pos.getLatitude();
double lon = pos.getLongitude();
// Muevo la camara a mi posicion
CameraUpdate cam = CameraUpdateFactory.newLatLng(new LatLng(
lat, lon));
googleMap.moveCamera(cam);}});
}
@Override
public void onResume(){
super.onResume();
mMapView.onResume();
}
@Override
public void onPause(){
super.onPause();
mMapView.onPause();
}
@Override
public void onDestroy(){
super.onDestroy();
mMapView.onDestroy();
}
@Override
public void onLowMemory(){
super.onLowMemory();
mMapView.onLowMemory();
}
}

XML

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.gms.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:apiKey="AIzaSyBtOk02dBY98C7S8BILmMyLLkMbUh8-jLs"/>