Market Helper is a tool for Android that helps users to be able to change/fake their rooted devices to any other devices. It can make your Nexus 7 become Samsung Galaxy S3 in a few seconds. No reboot is required.
Why do I need to use this?
To download and install incompatible apps from Android Market / Google Play Market on your devices. For example, if you want to install Viber on your Nexus 7, switch it to Samsung Galaxy S3 and you'll can. Or if you change your DPI value, you'll find this app very useful.
Words of Caution from the Developer:
*** USE AT YOUR OWN RISK *** I'll not take responsibility for anything happen to you or your account
*** THIS APP IS FOR ROOTED DEVICES ONLY ***