With their earnings report out later this month, Samsung Electronics Co. on Tuesday announced that its estimated quarterly operating income has fallen to its lowest level in more than three years, partly dragged down by weak sales of its flagship Galaxy phones. Former Apple users who were lured by big screen phablets from Samsung can now returned to Apple, and increasingly, there are many more brands to choose from across the Android spectrum, even budget options such as Xiaomi Redmi Note, which is selling very well in Singapore, and in big markets such as India, and China.