Problem With Admob In My Game

I Am Facing A Problem With Admob. I Recently Posted My Game On The Google Play Store With Admob.
The Game Is Live And Working With Ads.
But I Had To Delete The Plugin Because It Was Not Working With Latest The Google Play Game Services Plugin.
I Imported The Latest GPGS Plugin And Then Admob Plugin.
I Deleted The admobdemo.cs Script And Imported The GoogleMobileAdsDemoScript.cs (It Was Easier For Me To Setup And It Got Me No Errors).
I Am Getting Good Response Of Ads On The Editor But They Don’t Work On Mobile.
I Added The Same adUnitID On The Script That Was There In The Live App.
Are They Not Showing Up Because The App Is Already Linked?
Will They Show Up When I Will Update The Game?
Or Have I Messed Up?
Anyway Advice Will Be Helpful.
Regards.

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