HTC are taking the Chinese phone market more seriously for 2013 and have even modified the flagship HTC One with two must have features for Chinese customers.
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Leaked photos of a China Unicom version of the HTC One have appeared with 3 distinct differences over the phone you will find anywhere else in the world. The first difference being that you can remove the rear of the Chinese HTC One so that you can access the other differences, an SD card slot and dual-sim slots.
The HTC One (802w) pictured here is likely going through the necessary test and reviews before it can officially go on sale which could take a few months.[ Source ]