Android (operating system) and rival Linux mobile operating systems that were in development. These established players were skeptical: Nokia was quoted as saying "we don't see this as a threat," and a member of Microsoft's Windows Mobile team stated "I don't understand the impact that they are going to have." Since then Android has grown to become the most widely used smartphone operating system and "one of the fastest mobile experiences available". Reviewers have highlighted the open-source nature of the operating system as one of its defining strengths, allowing companies such as Nokia (Nokia X family), Amazon (Kindle Fire), Barnes & Noble (Nook),
Xiaomi Redmi Redmi phones has included the notion that the firm may be exaggerating its sales by releasing them in small batches, causing them to quickly sell out. On August 4, 2014, "The Wall Street Journal" reported that in China's smartphone market, Xiaomi overtook Samsung in the second-quarter of the 2014 fiscal year with a 14% market share in smartphone shipment rankings, while Samsung had a 12% market share during this time. Additionally, Yulong and Lenovo both had a 12% market share during this time. Redmi sales were attributed as contributing to Xiaomi's increased shipment rankings in the smartphone market. Conversely, in