Google Nexus One User Manual page 304

Market
To request a refund for an application
If you are not satisfied with an application, you can ask for a refund within 24 hours of
the purchase. Your credit card is not charged and the application is uninstalled from
your phone.
If you change your mind, you can install the application again, but you can't request a
refund a second time.
1 On the Android Market home screen, press Menu
2 Touch the application to uninstall for a refund.
The details screen for the application opens.
Touch Uninstall & refund.
3
Your application is uninstalled and the charge is cancelled.
Touch the explanation that best matches why you're uninstalling and touch OK.
4
To set whether you're notified about updated applications
1 On the Android Market home screen, press Menu
2 Press Menu
3 Select whether or not to be notified of updates to the applications you've
downloaded.
Touch OK.
4
To rate an application
You can award an application from one to five stars and share what you think about
the application with other shoppers.
1 Open the details screen for an application.
You can do this by browsing or searching for the application and then touching it;
or if you've downloaded the application, by touching it in the list of your
downloaded applications.
Touch the stars under My review.
2
Touch the number of stars to award the application and touch OK.
3
4 If you want to share a comment about the application, back on the details screen,
touch Post a comment.
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and touch Notifications.
and touch Downloads.
and touch Downloads.
Nexus One User's Guide
304