Yeah, but most of those can't be sold in the US. And, for PC hardware, much harder to find that stuff in the US.
If you want to use something on North American cell networks that's sold in China, GSM will be better. The GSM hardware you want will support GSM850 and 1900. For 3G, there are 1900, 1700, and 850 bands. The Chinese hardware will usually support four GSM bands (850, 900, 1800, 1900,) so voice and slow data will work, and most likely some combination of 900, 1800, and 2100 for 3G, so fast data won't work.