Huawei says it is working hard to overtake Apple's iPhone and Samsung's Galaxy line in the worldwide smartphone market. If you were to ask anyone over the last eight years if that were possible, you would have heard a resounding "no." The marketplace is changing, though, and anything is now possible. Today Apple, Google and Samsung are enormous, but the rate of smartphone growth has slowed. The reason for the slowdown will shed light on what to expect from Huawei. Smartphone sales are slowing for the first time in eight years.