You can get 3 packs and a card back by logging in on a Galaxy S6.
https://www.reddit.com/r/hearthstone...and_card_back/
If amazon doesn't work for you, just follow this guide:
http://inthecheesefactory.com/blog/h...-genymotion/en
And then just download the game via Google Play.
I got Prophet Velen and 2 Epics from the packs, drop rate seems good.