Mobile connectivity continues to expand globally, with mobile subscriptions projected to reach 4 billion by 2018. While over half the world remains unconnected, mobile companies are focusing on connecting the next billion users in developing regions. This will require more affordable devices and data plans, as well as designs and software tailored for regions with unreliable power and lower literacy. Nokia's 105 phone exemplifies this approach with its low $20 price point, 35-day battery life, and data-efficient browser. As 3G and 4G networks spread, they will boost the capabilities of mobile users worldwide. However, connecting the remaining population will be an ongoing challenge.