Korean company must overcome several hurdles if its two new phablets are to win over users and maintain its dominant position in the smartphone market

Samsung has just launched not one but two phablets, as it attempts to keep its large-screened smartphone crown.

But in its war with chief rival Apple, its home country competitor LG, and Chinese upstarts such as Xiaomi, Samsung has to get some critical things right, as the bar has been raised for quality, price and speed.