|The Bottom Line || Despite a few complaints, the Samsung Galaxy S II hits all the high notes, making the unlocked handset Samsung's most advanced and successful smartphone to date. || The Samsung Infuse 4G disappoints in some areas, but it's still a very good Android smartphone for AT&T customers as long as you're OK with the larger design. || Anyone looking for an alternative to the iPhone, but who wants better multimedia features and a more organized user interface than Android offers, should look at the Samsung Focus with Windows Phone 7, which has all that plus solid performance and a sleek design. || The T-Mobile Sidekick 4G continues the Sidekick's legacy as an excellent messaging device and also serves as a great entry-level smartphone. || The Samsung Nexus S 4G offers a great combination of design, features, and performance. The 4G connection could be more reliable, but the Gingerbread OS, stock Android UI, and admirable call quality make for a satisfying smartphone. || A great price makes the Samsung Exhibit 4G a compelling option for Android fans on the lookout for a deal, without sacrificing features.