A "flagship phone" refers to the best and most important smartphone that a company makes. It is the top model with the latest and greatest features and technology. Full definition
It's a feature that has become a defining trait of the new flagship phone in the absence of a physical Home button. (ibtimes.com)
Nearly universally, reviewers and early users of the phone have stated that the camera experience just isn't on par with other flagship phones in its category. (xda-developers.com)
It's the same chip used in the majority of flagship phones from late 2013, and naturally, performance on the phone is excellent. (digitaltrends.com)