I attempted to download the Free Plants vs. Zombies from Amazon Appstore, and it is telling me currently not compatible for my Android O/S on HTC Aria with 2.2. Because it needs a wifi download. However, the catch is I am currently connected to WIFI.
UPDATED: Login to Amazon Appstore from your p.c. or even the browser in your phone, and “purchase” the app, then goto you app list under the menu items, and download purchased apps. this works around the incompatible device issues.
Keep in mind this app is 75MB, make sure you get it moved over to your SD card!
help att pvz amazon