Ok, it works fine on my phone, you can play the game and see the ads working but it wont run in Unity properly. I get this error.
JNI: Unable to find method id for 'getName'
UnityEngine.AndroidJavaObject:CallStatic(String, Object[])
AdvertisementHandler:HideAds() (at Assets/Plugins/AdMob/AdvertisementHandler.cs:97)