By some estimates, it's believed that there are around six billion cell phone users in the world. That number is going to inch up quite a bit thanks to Nokia and its new duo of affordable phones. At this year's Mobile World Congress, Nokia introduced the 301 and the 105, but it's the 105 that got the most attention. A candy bar-style phone running on Nokia's Series 30 platform, the 105 will only cost $20. It's aimed at emerging markets and will be sold in China, Egypt, India, Indonesia, Nigeria, Russia, Vietnam and other markets in Africa, Asia-Pacific, Europe and the Middle East.