Hi Veer,
I successfully load test ad with a native android application build by eclipse, but using the latest unity plugin do nothing. after export google project and run in eclipse, when i click on the request banner button the logcat says:'06-03 03:07:40.641: I/Unity(17781): AndroidJavaException: java.lang.NoSuchMethodError: no non-static method "Lcom/google/android/gms/ads/AdRequest$Builder;.setRequestAgent(Ljava/lang/String;)Ljava/lang/Object;"
'
can you help me ? the test.apk on your link works fine!

thank you.