As many of the world's developed markets move toward saturation with smartphone penetration, emerging markets have become increasingly critical in driving growth for handset makers like Apple (NASDAQ:AAPL) and Samsung. The crown jewel of emerging markets is China, the world's largest smartphone market. And it's exactly that size that makes it one of the most closely watched markets by analysts and investors alike. In the video below, Fool contributor Andrew Tonner tells investors about one significant trend in this major market.

Fool contributor Andrew Tonner owns shares of Apple. Follow Andrew and all his writing on Twitter: @AndrewTonner.  The Motley Fool recommends Apple. The Motley Fool owns shares of Apple. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.