Admob Interstitial works, top banner doesn't

Hi, I’m trying to setup Admob banner on my game. Interstitials work fine, but I don’t know why my normal banners don’t show.

I can even see the Dummy ShowBannerView on the console.

Dummy ShowBannerView
UnityEngine.Debug:Log(Object)
GoogleMobileAds.Common.DummyClient:ShowBannerView() (at Assets/GoogleMobileAds/Common/DummyClient.cs:25)
GoogleMobileAds.Api.BannerView:Show() (at Assets/GoogleMobileAds/Api/BannerView.cs:40)
GoogleAdsController:ShowBanner() (at Assets/Scripts/Utils/GoogleAdsController.cs:61)
AdsShow:Start() (at Assets/Scripts/Ads/AdsShow.cs:20)

This is my GoogleAdsController.cs

using System;
using UnityEngine;
using System.Collections;

// Google ads
using GoogleMobileAds;
using GoogleMobileAds.Api;

public class GoogleAdsController : MonoBehaviour
{
    public static GoogleAdsController instance = null;

    private BannerView bannerView;
    private InterstitialAd interstitial;

    // Use this for initialization
    void Awake()
    {
        if (instance == null)
        {
            instance = this;
        }
        else if (instance != null)
        {
            Destroy(gameObject);
        }

        DontDestroyOnLoad(gameObject);
    }



    public void RequestBanner()
    {
#if UNITY_EDITOR
        string adUnitId = "unused";
#elif UNITY_ANDROID
        string adUnitId = "MY AD UNIT ID edited for this post";
#elif UNITY_IPHONE
        string adUnitId = "INSERT_IOS_BANNER_AD_UNIT_ID_HERE";
#else
        string adUnitId = "unexpected_platform";
#endif
        // Create a banner.
        bannerView = new BannerView(adUnitId, AdSize.SmartBanner, AdPosition.Top);

        // Register for ad events.
        bannerView.AdLoaded += HandleAdLoaded;
        bannerView.AdFailedToLoad += HandleAdFailedToLoad;
        bannerView.AdOpened += HandleAdOpened;
        bannerView.AdClosing += HandleAdClosing;
        bannerView.AdClosed += HandleAdClosed;
        bannerView.AdLeftApplication += HandleAdLeftApplication;
       
        // Load a banner ad.
        bannerView.LoadAd(createAdRequest());
    }

    public void ShowBanner()
    {
        bannerView.Show();
        Debug.Log ("Showing Google Banner Top");
    }

    public void HideBanner()
    {
        bannerView.Hide();
    }

    public void RequestInterstitial()
    {
        // http://stackoverflow.com/questions/12553929/is-there-any-admob-dummy-id
#if UNITY_EDITOR
        string adUnitId = "unused";
#elif UNITY_ANDROID
        string adUnitId = "MY AD UNIT ID edited for this post";
#elif UNITY_IPHONE
        string adUnitId = "";
#else
        string adUnitId = "unexpected_platform";
#endif

        // Create an interstitial.
       interstitial = new InterstitialAd(adUnitId);

        // Register for ad events.
        interstitial.AdLoaded += HandleInterstitialLoaded;
        interstitial.AdFailedToLoad += HandleInterstitialFailedToLoad;
        interstitial.AdOpened += HandleInterstitialOpened;
        interstitial.AdClosing += HandleInterstitialClosing;
        interstitial.AdClosed += HandleInterstitialClosed;
        interstitial.AdLeftApplication += HandleInterstitialLeftApplication;
       
        // Load an interstitial ad.
        interstitial.LoadAd(createAdRequest());
    }

    // Returns an ad request with custom ad targeting.
    private AdRequest createAdRequest()
    {
        return new AdRequest.Builder()
        #if UNITY_EDITOR
        .AddTestDevice(AdRequest.TestDeviceSimulator)
        #else
            //.AddTestDevice(AdRequest.TestDeviceSimulator)
            //.AddTestDevice("XXXXXXXXXXXXXXXXXXXXX")
            //.AddKeyword("game")
            //.SetGender(Gender.Male)
            //.SetBirthday(new DateTime(1985, 1, 1))
            //.TagForChildDirectedTreatment(false)
            //.AddExtra("color_bg", "9B30FF")
            #endif
        .Build();
    }

    public void ShowInterstitial()
    {
        if (interstitial.IsLoaded())
        {
           interstitial.Show();
        }
        else
        {
            //print("Google Ads: Interstitial is not ready yet.");
        }

        RequestInterstitial();
    }

    #region Banner callback handlers

    public void HandleAdLoaded(object sender, EventArgs args)
    {
        //print("Google Ads: HandleAdLoaded event received.");
    }

    public void HandleAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        //print("Google Ads: HandleFailedToReceiveAd event received with message: " + args.Message);
    }

    public void HandleAdOpened(object sender, EventArgs args)
    {
        //print("Google Ads: HandleAdOpened event received");
    }

    void HandleAdClosing(object sender, EventArgs args)
    {
        //print("Google Ads: HandleAdClosing event received");
    }

    public void HandleAdClosed(object sender, EventArgs args)
    {
        //print("Google Ads: HandleAdClosed event received");
    }

    public void HandleAdLeftApplication(object sender, EventArgs args)
    {
        //print("Google Ads: HandleAdLeftApplication event received");
    }

    #endregion

    #region Interstitial callback handlers

    public void HandleInterstitialLoaded(object sender, EventArgs args)
    {
        //print("Google Ads: HandleInterstitialLoaded event received.");
    }

    public void HandleInterstitialFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        //print("Google Ads: HandleInterstitialFailedToLoad event received with message: " + args.Message);
    }

    public void HandleInterstitialOpened(object sender, EventArgs args)
    {
        //print("Google Ads: HandleInterstitialOpened event received");
    }

    void HandleInterstitialClosing(object sender, EventArgs args)
    {
        //print("Google Ads: HandleInterstitialClosing event received");
    }

    public void HandleInterstitialClosed(object sender, EventArgs args)
    {
        //print("Google Ads: HandleInterstitialClosed event received");
    }

    public void HandleInterstitialLeftApplication(object sender, EventArgs args)
    {
        //print("Google Ads: HandleInterstitialLeftApplication event received");
    }

    #endregion
}

And AdsShow.cs on MainCamera

using UnityEngine;
using System.Collections;

public class AdsShow : MonoBehaviour {

    public bool GoogleBannerActive = true;

    void Awake (){
       
   
    }

    // Use this for initialization
    void Start () {

        //Checks if ads active
        if (GoogleBannerActive) {
            GoogleAdsController.instance.RequestBanner();
            GoogleAdsController.instance.ShowBanner ();
            Debug.Log ("Calling Google Banner Top");
        }

    }
   
    // Update is called once per frame
    void Update () {
       
    }

Any help would be appreciated!

SOLVED. I found my device id to test (just search device test id on google play) and all was way more easy.