Samsung says its Galaxy S IV phone will be unveiled March 14 . It came at Japan 's Mobile World Congress . Samsung unveiled a new tablet there but , taking a page from Apple 's playbook , opted not to roll out its flagship phone during the crowded event where many rival products are clamoring for attention . The popular Galaxy S III has emerged as the iPhone 's chief competitor .
Samsung says its Galaxy S IV phone will be unveiled March 14 . It came at Japan 's Mobile World Congress . The popular Galaxy S III has emerged as the iPhone 's chief competitor .