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Android developers, and Google. can decide which devices apps can be installed on. The reasons an app is

considered incompatible with your phone may include it having the "wrong" version of the Android OS and regional restrictions. If you root your phone. you can use Market Helper (bit.ly/Markethelper) to install incompatible apps. Alternatively, you can also use APK Downloader (bit.ly/apkdownload) to download APK files from Google Play to sideload on your device. You need to enter your username and password to use this tool; read the FAQ on the site to see why, and steer clear if you're not comfortable providing this information. There's also an APK Downloader for the Amazon Appstore.