The "feature" mobile phone is the globe's top selling consumer electronics product. For many of the world's poor, due to meager connectivity in rural areas and the costs of more advanced mobiles, these phones effectively support only voice and text (or SMS) functions. Feature mobiles have spread into some of the most remote areas of the globe, with 48 million people now with cell phones but no electricity, and by next year, 1.7 billion with cell phones but no bank account, according to one estimate.