There is a demand for dual SIM phones which means that by extension, there must be a demand for dual SIM Windows Phone; if a published report out of China is correct, that demand is going to be met by two Windows Phone models from Nokia and HTC. Back in August, a tweet from Nokia Lebanon hinted at a dual SIM version of the Nokia Lumia 625...
Source: http://www.phonearena.com/news/Dual-SIM-Windows-Phone-models-said-to-be-coming-from-Nokia-and-HTC_id48173
Source: http://www.phonearena.com/news/Dual-SIM-Windows-Phone-models-said-to-be-coming-from-Nokia-and-HTC_id48173