Samsung Galaxy S4 review: Gimmicky, but still one of the best

• Samsung had a smartphone breakthrough last year with the Galaxy S III, which sold 50 million units worldwide.
• This year the Galaxy S4, doesn't feel quite as eventful, but its hardware improvements and user-interface refinements are enough to preserve its status as one of the best Android smartphones.
• The camera works well in most normal situation.
• The screen brightness ranging between 50% and 75%, 4G turned on, and few apps and services running in the background like Facebook, Gmail, and Google talk.

http://money.cnn.com/2013/04/24/technology/mobile/samsung-galaxy-s4-review/index.html