Nokia was once the dominant player in the mobile phone market but has lost significant market share to competitors like Apple and Samsung. Several factors contributed to Nokia's decline, including: failing to create a strong app ecosystem for its Symbian platform; focusing too much on its own internet services rather than partnering with emerging leaders like Facebook and YouTube; and being slow to adopt innovative new designs like touchscreens. While Symbian had advantages, Nokia's user interface was poor. Switching to the Microsoft Windows Phone platform has so far failed to revive Nokia's declining sales and share price. Unless Nokia can capitalize on opportunities from patent battles, its future looks uncertain.