Apple may have ushered in the era of smartphones, but the best-selling cellphone of all time is not an iPhone. The Nokia 1100 and 1110 hold the top two slots. Mobile phones, particularly smartphones, have been an essential part of daily life for a while now. Nearly two decades after the original iPhone, these devices are about far more than just making calls. They connect us to the wider world, keep us ent... [2160 chars]