Remember how you could get a free $25 credit toward the Google Play store when you bought a Google Nexus 7 tablet? Now, it’s even better if you decided to pick up a Samsung Galaxy S III smartphone, because you’ll be getting a free $50 Google Play credit to spend as you see fit. Buy apps, buy games, buy movies… it’s up to you.

This promotion, according to RadioShack PR guy Adam Lee, will be starting this Sunday, November 18. The catch is that you only get the complimentary Google Play credit when you sign up for a qualifying two-year plan with the corresponding wireless carrier. You can do this in-store with AT&T, Sprint or Verizon. Alternatively, an online purchase can be done with Sprint and Verizon only. You might remember that you also get two years of a 50GB Dropbox account upgrade with the S3 too. That’s a lot of bonus action.

The Samsung Galaxy S III is $99.99 on contract for new and upgrading customers for AT&T and Verizon, while new Sprint customers can get the special promotional price of $49.99; existing Sprint customers pay the same $99.99 contract price. All of this money-spending also qualifies for RadioShack’s holiday bonus of $10 back for every $50 spent in-store or online.

From what I can gather the free $50 Google Play credit only applies if you buy the S3 from RadioShack, but if you’re in the market for this awesome Android smartphone anyway, you might as well get the bonus.

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