Buy an Android phone or tablet at Amazon and get an extra $15 worth of apps, music and e-books

Amazon, the king of sweet deals, is running an interesting promotion designed to boost both sales of Android phones on their site and app downloads through its Appstore for Android. You can now get any Android smartphone or tablet sold through their site between July 11 and through October 11 and the company will put a $15 credit into your account that can be redeemed against app purchases on the Amazon Appstore for Android. You can also buy music on the Amazon MP3 store and e-books on the Kindle Store, if you want.

The credit will be in your account once your Android phone ships, with the expiry date set to November 12. More about the terms of this promotion here. Amazon Wireless offers a decent selection of phones, including the latest models such as HTC’s Thunderbolt 4G, LG’s Revolution and Motorola’s Droid X2. The $15 credit is split between the three stores, with each getting a $5 credit. This should be enough to buy you a cheap or discounted Kindle book, a couple of 99-cent games or apps and a few songs or even a whole album.