Some android apps are restricted to certain countries or regions. This is usually due to licensing issues with third parties. A good example is Google Music. You can only sign up for Google Music by fooling Google into thinking that you live in America. This can be done via a proxy. To then enjoy Google Music on your android phone, you’ll need the Google Music app. To get the app, you’ll need to be stateside too or spoof yourself as if you were.
The trick is to get an app from the android market called Market Enabler. This allows you to spoof your location and mobile carrier network to the market. It will give you a list of countries to spoof as. When you reboot your phone or set it to airplane mode, the spoof will be turned off. Essentially what this app does is change the user agent details which your phone sends to the market.