That's really weird
just yet It's working I don't no why ????!! WTF !!!
Try this I install this admob plugin : com.cranberrygame.phonegap.plugin.ad.admob and this one : com.google.playservices
In construct 2 code i put this : On a start of layout ---> I put preload banner ad in last
And I create a co:dition Every 15 sec -------> Show banner ad
When I build it it's working. I don't know why