What's the ideal size for a smartphone? It's a question so uncertain that for the last couple of years all manufacturers have adopted a two-size strategy. Samsung did it way back when with the Galaxy Note - a larger, updated Galaxy S. Apple sees things differently, it launches the iPhone and iPhone Plus simultaneously, so the Plus model isn't an upgrade but instead an option. Other manufacturers are doing it too, even if they name the phones different things instead of tacking on a Note, Plus, Pro, Max, Ultra, XL or to the name of the larger phone. Case in point, Huawei has the 5.5"...
Source: http://www.gsmarena.com/weekly_poll_whats_the_ideal_screen_size_for_a_smartphone-news-17902.php
