The Nokia Lumia 636, bearing the model number RM-1010, has passed through certification in China. If you're not familiar with the Lumia 636, it's essentially the TD-LTE version of the Lumia 635. It's also worth noting that this will mark the very first TD-LTE Windows Phone from Nokia (now Microsoft after the acquisition of Nokia's devices division).
The single-SIM device itself supports TD-LTE/TD-SCDMA/GSM and runs Windows Phone 8.1. Unfortunately, while the Windows Phone has passed certification in the region, there's not yet a date as to when the Lumia 636 will go on sale in China. We are, however, looking at a device in the lower end of the Lumia family, and one that's hoped to sell well.
There's also the mention of a Lumia 638 in the photo above, which could well be the dual-SIM variant.
Source: Teena (Chinese), Baidu; Thanks, hengxiang3240, for the tip!
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Rich Edmonds was formerly a Senior Editor of PC hardware at Windows Central, covering everything related to PC components and NAS. He's been involved in technology for more than a decade and knows a thing or two about the magic inside a PC chassis. You can follow him on Twitter at @RichEdmonds.