To update the Amazon Appstore on your Android device, open the app by tapping on it, access the menu, and then tap Settings. Once the settings menu opens, tap Version and Release notes, and then tap the Check for Update option. Instructions regarding the download and installation processes should appear if the Amazon Appstore app detects that an update is available.
Amazon Appstore serves as an alternative to Google Play on Android devices, and it’s included by default on most Verizon devices as of 2015, including the Samsung Galaxy S6 and HTC One M9. If you have a device that doest’t include the Amazon Appstore, acquire it by downloading the APK installation file from Amazon.com and running it. This process requires disabling a security setting that prevents the installation of apps from unknown sources.
Amazon Appstore requires at least the 2.2 version of the Android operating system to run properly and an Amazon.com account to avoid the SMS verification process. Amazon.com provides an alternative to Amazon Appstore in the form of the Amazon Underground app that provides access to over many apps, games and in-app items for free. To install these apps, select one from the Underground Apps section on Amazon.com, and provide your phone number to receive an SMS with a download link. Alternatively, navigate to this section on your phone’s device's Web browser to download the app directly.