people who are not living in the US and not able to download it off the Market can still get their hands on it. Google+ app(version 1.0.2.) is better than the mobile site because it receives instant notifications. In addition to that, whatever photos you snap with your Android will be automatically uploaded and once that’s done, you can share them on Google+ from any device. You can also switch that option off if you want. However, You will need a Google+ account to enjoy the App experience.
1- At Home Screen press the Menu button then go to Settings>Applications and from there check the “Unknown Sources” dialogue box.
2- Open web browser e.g “Skyfire” or “Opera” from your Android device and Go to following link
3- Download Google+ APK file by clicking link highlighted in red color in step 2.
4- Install the downloaded APK file and enjoy the Google+ experience.