Implement Mobile Ads (Android - Interstitial Ad)

I was wondering if someone has managed to implement an Interstitial Ad in their mobile game. I have managed to implement a banner into my game but has yet to get the Interstitial Ad to work. Any insight on how this can be achieved will be appreciated. Currently I have it hooked up this way: Load Interstitial Ad > Is Interstitial Ad Requested (If Yes) > Is Interstitial Ad Available (If True) > Show Interstitial Ad.
If it’s false in both cases I try to load the Interstitial Ad again until it shows. This doesn’t seem to work at all.