There's a lot of talk of a new iPhone coming soon, and the Chinese know it. IDC researchers estimate that Apple's share of smartphones in the country was sliced almost in half during the second quarter, to 10 percent, as expectations and rumors led the local population to wait for the big update. Better competition also played a part in denting iPhone shipments, although it's not Apple's chief rival Samsung who's responsible. Rather, it's China's own Lenovo that had the most impact. It broke into the double digits with a second-place 11 percent share thanks to recently started indirect sales of its Android-dominated lineup, while Samsung saw its own share dip slightly to 19 percent. Chinese companies ZTE and Huawei bracketed Apple at third and fifth. We wouldn't be surprised if the balance of power shifts in about a month, but the impacts to Apple and Samsung alike show just how tough it can be to stay on top in one of the fastest-growing markets on Earth -- especially one with so many local brands.