Samsung overtook Nokia as the world's largest mobile handset maker in the first quarter of 2012. The smartphone market is becoming a "two horse race" between Samsung and Apple. RIM unveiled its BlackBerry 10 platform and developer tools as its last chance to succeed, but reported losses and may look to sell the company. MTN reported a 4% increase in subscribers for the first quarter of 2012 driven by growth in South Africa, Nigeria, and Iran.