I am planning to buy a new smartphone for my regular use. The activities I perform throughout my day that include use of the phone are for professional use, entertainment and social networking. I have searched on internet for latest smartphones and closed in my search to Motorola Atrix HD and Samsung Galaxy S3. I found both these phones good for my use, but still there must be some difference that makes them different from each other. Can someone tell me which of these smartphones is best?