HTC One dual-SIM model has been listed at the HTC India website with same specifications as the HTC One.

HTC is heavily banking on its flagship One smartphone which comes with aluminum unibody design. While the phone seems to be doing fairly well in India, the company has another surprise for the Indians. The Taiwanese company now has listed a dual-SIM HTC One model at its HTC India website as coming soon. While the core features of the HTC One and HTC One dual-SIM remain the same, the notable change is observed in the storage department. There are no details on the pricing of the HTC One dual-SIM model.
HTC One's new twin handset - HTC One dual-SIM is meant for those who don't wish to carry two devices and want to enjoy one powerful device only. Like the single SIM variant, the dual SIM HTC One has also a 4.7-inch full HD display with 468 pixels per inch pixel density. The display has been constructed using Corning Gorilla Glass 2 technology.
The HTC One dual-SIM model will pack a quad-core 1.7 GHz Qualcomm Snapdragon 600 mobile processor with 2 GB RAM. Though it has only 16 GB internal storage, it comes with a memory card slot for up to 64 GB micro SD card. The phone also comes with a removable back panel to put the dual SIM cards and micro SD Card. The dual-SIM card supports one 3G network card and other 2G network card inside.